Local footballer Aaron McDonald (2nd R), 20, of Western AFC and his teammates pay their respects to victims of the twin mosque massacre outside the Al Noor Mosque in Christchurch on March 23, 2019. - Muslims returned on March 23 to Christchurch's main mosque for the first time since a white supremacist launched a massacre of 50 worshippers there, as New Zealand sought to return to normal following the searing tragedy. (Photo by Anthony WALLACE / AFP)

Members of local football team Western AFC pay their respects to victims of the twin mosque massacre with a moment of silence outside the Al Noor Mosque in Christchurch on March 23, 2019. - Muslims returned on March 23 to Christchurch's main mosque for the first time since a white supremacist launched a massacre of 50 worshippers there, as New Zealand sought to return to normal following the searing tragedy. (Photo by Anthony WALLACE / AFP)

A member of local football club Western AFC places a scarf of English football club Westham United upon a bouquet of flowers left by a teammate as they all pay their respects to victims of the twin mosque massacre outside the Al Noor Mosque in Christchurch on March 23, 2019. - Muslims returned on March 23 to Christchurch's main mosque for the first time since a white supremacist launched a massacre of 50 worshippers there, as New Zealand sought to return to normal following the searing tragedy. (Photo by Anthony WALLACE / AFP)

Local footballer Aaron McDonald (C), 20, of Western AFC and his teammates pay their respects to victims of the twin mosque massacre outside the Al Noor Mosque in Christchurch on March 23, 2019. - Muslims returned on March 23 to Christchurch's main mosque for the first time since a white supremacist launched a massacre of 50 worshippers there, as New Zealand sought to return to normal following the searing tragedy. (Photo by Anthony WALLACE / AFP)

In a picture taken from a road outside the Al Noor Mosque, a policeman guards the mosque premises as members of the public walk within the mosque grounds in Christchurch on March 23, 2019, after people were allowed to visit in groups of fifteen. - Muslims prayed at Christchurch's main mosque for the first time since a white supremacist massacred worshippers there as New Zealand sought to return to normality after the tragedy. (Photo by Anthony WALLACE / AFP)

A man (L) performs a haka for Prince El Hassan bin Talal of Jordan (centre R, brown jacket) after the prince visited the Al Noor Mosque in Christchurch on March 23, 2019. - Muslims prayed at Christchurch's main mosque for the first time since a white supremacist massacred worshippers there as New Zealand sought to return to normality after the tragedy. (Photo by Anthony WALLACE / AFP)

People gather outside the Al Noor Mosque after the main road that runs alongside it was opened to traffic in Christchurch on March 23, 2019. - Muslims prayed at Christchurch's main mosque for the first time since a white supremacist massacred worshippers there as New Zealand sought to return to normality after the tragedy. (Photo by Anthony WALLACE / AFP)

In a picture taken from a road outside the Al Noor Mosque, a man is seen praying inside the mosque premises in Christchurch on March 23, 2019, after members of the public were allowed to visit in groups of fifteen. - Muslims prayed at Christchurch's main mosque for the first time since a white supremacist massacred worshippers there as New Zealand sought to return to normality after the tragedy. (Photo by Anthony WALLACE / AFP)

In a picture taken from a road outside the Al Noor Mosque, a man (back C) is seen praying inside the mosque premises in Christchurch on March 23, 2019, after members of the public were allowed to visit in groups of fifteen. - Muslims prayed at Christchurch's main mosque for the first time since a white supremacist massacred worshippers there as New Zealand sought to return to normality after the tragedy. (Photo by Anthony WALLACE / AFP)

A mother and her daughter look at tributes left as a tribute to victims of the twin mosque massacre in a park outside the Al Noor Mosque in Christchurch on March 23, 2019. - Muslims prayed at Christchurch's main mosque for the first time since a white supremacist massacred worshippers there as New Zealand sought to return to normality after the tragedy. (Photo by Anthony WALLACE / AFP)

A mother and her daughter look at tributes left as a tribute to victims of the twin mosque massacre in a park outside the Al Noor Mosque in Christchurch on March 23, 2019. - Muslims prayed at Christchurch's main mosque for the first time since a white supremacist massacred worshippers there as New Zealand sought to return to normality after the tragedy. (Photo by Anthony WALLACE / AFP)

A young boy rests his chin on a police cordon as he and others watch religious leaders and Qatari delegates visit the Al Noor Mosque in Christchurch on March 23, 2019. - Muslims prayed at Christchurch's main mosque for the first time since a white supremacist massacred worshippers there as New Zealand sought to return to normality after the tragedy. (Photo by Anthony WALLACE / AFP)

(FILES) In this file photo taken on November 16, 2014 from a propaganda video released by al-Furqan Media allegedly shows members of the Islamic State jihadist group preparing the simultaneous beheadings of at least 15 men described as Syrian military personnel. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / AL-FURQAN MEDIA / AFP)

(FILES) In this file photo taken on February 26, 2015 from an image grab taken off a video reportedly released by Media Office of the Nineveh branch of the Islamic State (IS) Group, an IS militant pushing a statue inside the Mosul museum in the northern Iraqi Governorate of Nineveh. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / Welayat Nineveh Media Office / AFP)

(FILES) In this file photo taken on March 26, 2015, a Syrian Kurdish boy sits on a destroyed tank in the Syrian town of Kobane, also known as Ain al-Arab. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Yasin AKGUL / AFP)

(FILES) In this file photo taken on June 28, 2015 Tourists mourn at the site of a shooting attack on the beach in front of the Riu Imperial Marhaba Hotel in Port el Kantaoui, on the outskirts of Sousse south of the capital Tunis, on June 28, 2015. The Islamic State (IS) group claimed responsibility on June 27 for the massacre in the seaside resort that killed nearly 40 people, most of them British tourists, in the worst attack in the country's recent history. AFP PHOTO / KENZO TRIBOUILLARD - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Kenzo TRIBOUILLARD / AFP)

(FILES) In this file photo taken on July 21, 2015 The mother of a victim cries for her son on his coffin during a funeral ceremony in Gaziantep following a suicide bomb attack the day before which killed at least 31 in the southern Turkish town of Suruc. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Bulent KILIC / AFP)

(FILES) In this file photo taken on November 15, 2015 People light candles at a makeshift memorial in front of "Le carillon" restaurant one of the site of the attacks in Paris in the 10th district of Paris. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by LOIC VENANCE / AFP)

(FILES) In this file photo taken on November 16, 2015, in Paris, the Eiffel Tower is illuminated with the colors of the French flag, in tribute to the victims of the November 13 Paris terror attacks. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Ludovic MARIN / AFP)

(FILES) In this file photo taken on November 23, 2015 French Rafale fighter aircrafts come back aboard the French Charles-de-Gaulle aircraft carrier, after flights at eastern Mediterranean sea, as part of operation Chammal in Syria and Irak against the Islamic State group, as France launched air strikes against Islamic State group targets in Iraq in the first sorties from the Charles de Gaulle aircraft carrier, newly deployed in the eastern Mediterranean. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ANNE-CHRISTINE POUJOULAT / AFP)

(FILES) This file video still image obtained January 8, 2016 courtesy of the Philadelphia Police Department, shows a shooting suspect and police car on January 7, 2016 in Philadelphia, PA. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by HO / PHILADELPHIA POLICE DEPARTMENT / AFP)

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on January 17, 2016 A member of Iraqi security forces look at bodies on the ground as they clear al-Sajarya district on the eastern outskirts of Ramadi, the capital of Anbar province a few weeks after declaring victory against the Islamic State (IS) group. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by STRINGER / AFP)

(FILES) In this file photo taken on March 31, 2016 a photographer holds his picture of the Temple of Bel taken on March 14, 2014 in front of the remains of the historic temple after it was destroyed by Islamic State (IS) group jihadists in September 2015 in the ancient Syrian city of Palmyra. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by JOSEPH EID / AFP)

(FILES) In this file photo taken on April 24, 2016 Rescue workers help an injured man after a rocket hit a mosque in Kilis. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Yasin AKGUL / AFP)

(FILES) In this file photo taken on April 24, 2016 An injured man walks away after Turkish anti riot police used water cannon to disperse people who gathered after a rocket hit a mosque in Kilis. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Yasin AKGUL / AFP)

EDITORS NOTE: Graphic content / (FILES) This file photo obtained from the Ihlas News Agency on June 28, 2016 shows injured people lying on the ground next to a terminal, after two explosions followed by gunfire hit the Turkey's biggest airport of Ataturk in Istanbul. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / IHLAS NEWS AGENCY / AFP) / Turkey OUT

(FILES) In this file photo taken on July 26, 2016 A policeman cordons the site next to the body of one of the two men who stormed a French church and slit an elderly Catholic priest's throat in the Normandy town of Saint-Etienne-du-Rouvray. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / AFP)

(FILES) In this file photo taken on October 29, 2016 Iraqi families who were displaced by the ongoing operation by Iraqi forces against jihadists of the Islamic State group to retake the city of Mosul, are seen near Qayyarah, south of Mosul. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by BULENT KILIC / AFP)

(FILES) In this file photo taken on October 29, 2016 Iraqi families who were displaced by the ongoing operation by Iraqi forces against jihadists of the Islamic State group to retake the city of Mosul, are seen between Makhmour and Qayyarah, as they flee. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by BULENT KILIC / AFP)

(FILES) In this file photo taken on November 03, 2016, Iraqi families, who fled the violence due to the ongoing operation by Iraqi forces against jihadists of the Islamic State group to retake the city of Mosul, wait on a truck with white flags at a Kurdish checkpoint, some 20 kilometres (12 miles) from Mosul. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by BULENT KILIC / AFP)

(FILES) In this file photo taken on November 04, 2016 An Iraqi woman, who fled the violence due to the ongoing operation by Iraqi forces against Islamic State group jihadists to retake the city of Mosul, sits in a car driving through the village of Gogjali, as families head to camps for displaced people. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by BULENT KILIC / AFP)

(FILES) In this file photo taken on December 11, 2016 A nun reacts as Egyptian security forces (unseen) inspect the scene of a bomb explosion at the Saint Peter and Saint Paul Coptic Orthodox Church in Cairo's Abbasiya neighbourhood. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by KHALED DESOUKI / AFP)

(FILES) In this file photo taken on December 20, 2016 Christian militia fighters from the Nineveh Plain Protection Units (NPU) show four men, allegedly members of the Islamic State (IS) group that were found inside a tunnel in Mosul, as they sit blindfolded in the back of a pick-up truck in Qaraqosh (also known as Hamdaniya), some 30 kilometres east of IS's last remaining stronghold in Iraq. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by JM Lopez / AFP)

(FILES) In this file photo taken on December 21, 2016 Overall view shows the area of the Christmas market area and the destroyed booths targeted by an attack with a truck two days ago in front of the Kaiser-Wilhelm-Gedaechtniskirche (Kaiser Wilhelm Memorial Church) in Berlin. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Odd ANDERSEN / AFP)

(FILES) In this handout file photo taken on January 02, 2017 from a video grab of CCTV and released on January 2, 2017 by Haber Turk Gazete newspaper shows an gunman carrying out an attack on the Reina nightclub, on the bank of the Bosphorus, in Istanbul. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by STRINGER / HABER TURK GAZETE / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / CCTV / STRINGER" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

(FILES) In this file photo taken on January 08, 2017 An Iraqi man shields his daughter from seeing the body of an Islamic State (IS) fighter as they flee Mosul's al-Mithaq neighbourhood on January 8, 2017, during an ongoing military operation against the militants. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Dimitar DILKOFF / AFP)

(FILES) In this file photo taken on February 01, 2017 A displaced Syrian woman, fleeing from Deir Ezzor city besieged by Islamic State (IS) group fighters, walks through the falling snow carrying a child on her shoulder in a refugee camp in al-Hol, located some 14 kilometers from the Iraqi border in Syria's northeastern Hassakeh province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by DELIL SOULEIMAN / AFP)

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on February 21, 2017 Iraqi security forces pose for a picture next to a body in the village of al-Buseif, south of Mosul, during an offensive to retake the western side of the city from Islamic State (IS) group fighters on February 21, 2017. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on February 25, 2017 A mortar thrown by Islamic State (IS) group fighters lands near a vehicle belonging to Iraq's elite Rapid Response Division during the assault to retake the northern city of Mosul, as Iraqi forces continue the offensive to retake the city's western half from IS. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on February 25, 2017 A Syrian girl, holding her stuffed toy, stands next to the rubble of buildings in the northwestern Syrian border town of al-Bab on February 25, 2017 after Turkish-backed rebels announced the recapture of the town from the Islamic State (IS) group earlier in the week. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Nazeer al-Khatib / AFP)

(FILES) In this file photo taken on March 01, 2017 Iraqis holding white flags walk down a road as they flee Mosul during an offensive by security forces to retake the western parts of the city from Islamic State (IS) group fighters. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on March 01, 2017 A member of the Iraqi forces walks past a mural bearing the logo of the Islamic State (IS) group in a tunnel that was reportedly used as a training centre by the jihadists in the village of Albu Sayf, on the southern outskirts of Mosul. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on March 02, 2017 Smoke billows in the background as Syrian regime fighters advance to retake the ancient city of Palmyra, from Islamic State (IS) group fighters. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by STR / AFP)

(FILES) In this file photo taken on March 03, 2017 Iraqi families walk down a road as they flee Mosul during an offensive by security forces to retake the western parts of the city from Islamic State (IS) group fighters. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on March 03, 2017 Iraqi families walk down a road as they flee Mosul during an offensive by security forces to retake the western parts of the city from Islamic State (IS) group fighters. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) This file photo taken on March 04, 2017 shows a Syrian army T-62 tank at the damaged site of the ancient city of Palmyra in central Syria. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Louai Beshara / AFP)

(FILES) In this file photo taken on March 05, 2017 Fire and smoke billow following a car bomb explosion as Iraqi forces clash with Islamic State (IS) group fighters in Mosul during an offensive to retake the western parts of the city from the jihadists. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on March 07, 2017 Iraqi government forces supported by fighters from the Abbas Brigade, which fight under the umbrella of the Shiite popular mobilisation units, advance in village of Badush some 15 kilometres northwest of Mosul during the ongoing battle to retake the city's west from Islamic State (IS) group jihadists on March 7, 2017. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Mohammed SAWAF / AFP)

(FILES) In this file photo taken on March 08, 2017 An Iraqi woman lies on the ground as civilians flee Mosul while Iraqi forces advance inside the city during fighting against Islamic State group's fighters. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on March 08, 2017 A member of the Iraqi forces checks the body of a reported jihadist in west Mosul as troops advance inside the city during fighting against Islamic State group's fighters. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on March 10, 2017 A Humvee passes over the body of a jihadist in west Mosul as Iraqi forces advance in the city in the ongoing battle to seize it from the jihadists of the Islamic State (IS) group. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on December 24, 2014 A still image released by the Islamic State group's branch in Raqa on jihadist websites purportedly shows a Jordanian pilot (C) captured by IS group's fighters after they shot down a warplane from the US-led coalition with an anti-aircraft missile near Raqa city. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / WELAYAT RAQA / AFP)

(FILES) In this file photo taken on February 16, 2015 A relative of one of the Egyptian Coptic Christians purportedly murdered by Islamic State (IS) group militants in Libya reacts after hearing the news in the village of Al-Awar in Egypt's southern province of Minya. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by MOHAMED EL-SHAHED / AFP)

(FILES) In this file photo, Heavy smoke billows during an operation by Iraqi Kurdish forces backed by US-led strikes in the northern Iraqi town of Sinjar on November 12, 2015, to retake the town from the Islamic State group and cut a key supply line to Syria. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by SAFIN HAMED / AFP)

In this file picture, Syrians fleeing the war rush through broken down border fences to enter Turkish territory illegally, near the Turkish border crossing at Akcakale in Sanliurfa province on June 14, 2015. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by BULENT KILIC / AFP)

(FILES) This file photo made available by Jihadist media outlet Welayat Homs on May 28, 2015 allegedly shows a flag of the Islamic State (IS) group fluttering atop the circular wall bounding the orchestra at the Roman theatre of the ancient city of Palmyra, a 2,000-year-old metropolis and an Unesco world heritage site located 215 kilometres northeast of Damascus. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / WELAYAT HOMS / AFP)

(FILES) In this file photo, Destroyed building are seen around a sign that reads, ''Kobane'' in the Syrian Kurdish town of Kobane, also known as Ain al-Arab, on March 24, 2015. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by YASIN AKGUL / AFP)

In this file picture, a Kurdish female fighter of the Women's Protection Units (YPJ) looks on at a training camp in al-Qahtaniyah, near the Syrian-Turkish border on February 13, 2015. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by DELIL SOULEIMAN / AFP)

A combination made on November 13, 2015, of various handout file pictures and image grabs, shows (Top L to Bottom R) Japanese freelance video journalist Kenji Goto, US aid worker Peter "Abdel-Rahman" Kassig, US freelance reporter James Foley, Japanese national Haruna Yukawa, US freelance writer Steven Sotloff, British national Alan Henning and British aid worker David Haines, the victims of Islamic State militant "Jihadi John", whose real name is Mohammed Emwazi. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by DSK / AFP)

(FILES) In this file photo taken on January 26, 2015 Iraqi government forces celebrate while holding an Islamis Sate (IS) group flag after they claimed they have gained complete control of the Diyala province, northeast of Baghdad near the town of Muqdadiyah. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by YOUNIS AL-BAYATI / AFP)

(FILES) In this file photo taken on April 24, 2018 A Sukhoi Su-22 Syrian army plane releases bombs over southern Damascus in the area of Yarmuk Palestinian refugee camp on April 24, 2018. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Rami al SAYED / AFP)

(FILES) In this file photo taken on September 07, 2018 A Russian Sukhoi Su-34 fighter drops bombs over the Syrian village of Kafr Ain in the southern countryside of Idlib province on September 7, 2018. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Anas AL-DYAB / AFP)

(FILES) In this file photo taken on January 08, 2014 bodies of handcuffed and blindfolded dead men lie on the ground of the Aleppo headquarters of the Islamic State of Iraq and the Levant (ISIL) after they were allegedly executed by the al-Qaeda-linked group, in the northern city of Aleppo. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Zakaria ABDELKAFI / AFP)

(FILES) In this file photo taken on January 20, 2014 the scene of a double suicide car bombing at the Bab al-Hawa border post between Syria and Turkey which killed at least 16 people and wounded 20 more. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / IHLAS NEWS AGENCY / AFP)

(FILES) In this file photo taken on June 15, 2014 on the jihadist website Welayat Salahuddin allegedly shows militants of the Islamic State of Iraq and the Levant (ISIL) executing dozens of captured Iraqi security forces members at an unknown location in the Salaheddin province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / WELAYAT SALAHUDDIN / AFP)

(FILES) A file image uploaded on June 14, 2014 on the jihadist website Welayat Salahuddin allegedly shows militants of the Islamic State of Iraq and the Levant (ISIL) executing dozens of captured Iraqi security forces members at an unknown location in the Salaheddin province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / WELAYAT SALAHUDDIN / AFP)

(FILES) This file photo taken on June 16, 2014 made available by the jihadist Twitter account Al-Baraka news allegedly shows Islamic State of Iraq and the Levant (ISIL) militants executing members of the Iraqi forces on the Iraqi-Syrian border. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / ALBARAKA NEWS / AFP)

(FILES) In this file image grab taken from a video uploaded on Youtube on February 19, 2014, allegedly shows militants from the Islamic State of Iraq and the Levant (ISIL) executing a group of Iraqi soldiers at an undisclosed location the Iraqi Anbar province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / Nasr Al-Mujahedeen / AFP)

(FILES) In this file photo taken on July 05, 2014 from a propaganda video released by al-Furqan Media allegedly shows the leader of the Islamic State (IS) jihadist group, Abu Bakr al-Baghdadi, aka Caliph Ibrahim, adressing Muslim worshippers at a mosque in the militant-held northern Iraqi city of Mosul. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / AL-FURQAN MEDIA / AFP)

(FILES) In this file photo taken on October 06, 2014 Alleged Islamic State (IS) militants stand next to an IS flag atop a hill in the Syrian town of Ain al-Arab, known as Kobane by the Kurds, as seen from the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Aris MESSINIS / AFP)

(FILES) In this file photo taken on January 19, 2016 Members of an armed Philippine Christian group calling themselves Red God's defenders (Pulahan) burn a blag flag at an unspecified area somewhere in the Central Mindanao mountains. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by MARK NAVALES / AFP)

(FILES) In this file photo taken on March 22, 2016 An injured woman looks on as another speaks on her mobile phone following twin blasts at Brussels airport in Zaventem as part of co-ordinated attacks claimed by Islamic State group (IS) millitants at the city's airport and in a Metro train. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Ketevan Kardava / Georgian Public Broadcaster / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / KETEVAN KARDAVA / Georgian Public Broadcaster

(FILES) In this file photo taken on March 23, 2016 A member of the civil protection holds his face in his hands as he come back from the Maalbeek metro station in Brussels, one day after the attack that killed 20 people. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by THIERRY ROGE / BELGA / AFP) / Belgium OUT

(FILES) In this file photo taken on March 03, 2016 Iraqi girls hold makeshift white flags as they flee with their families a military operation by Iraqi security personnel aimed at retaking areas from Islamic State group jihadists, in the desert west of the city of Samarra. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on March 22, 2016 damages are seen on the Brussels Airport in Zaventem following twin blasts. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by PATRIK STOLLARZ / AFP)

(FILES) In this file photo taken on April 04, 2016 A picture shows the destroyed stone sarcophagus of Syriac Catholic Saint Elian at the entrance to his monastery in the town of al-Qaryatain in the province of Homs in central Syria after Syrian troops regained control of the town the previous day. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by JOSEPH EID / AFP)

(FILES) In this file photo taken on August 21, 2016 A woman cries at the morgue as she waits for the coffin of her relative, killed during last night's attack on a wedding party that left 50 dead in Gaziantep in southeastern Turkey near the Syrian border. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMED DEEB / AFP)

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on September 12, 2016 A Syrian girl reacts in pain as a wounded child lies next to her at a make-shift hospital following reported government air strikes on the rebel-held town of Douma, east of the capital Damascus. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Abd Doumany / AFP)

(FILES) In this file photo taken on October 10, 2016 Fighters from the Free Syrian Army take part in a battle against the Islamic State (IS) group jihadists in the northern Syrian village of Yahmoul in the Marj Dabiq area north of the embattled city of Aleppo. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Nazeer al-Khatib / AFP)

(FILES) In this file photo taken on October 19, 2016 An Iraqi forces M109 self-propelled howitzer fires towards the village of Tall al-Tibah, some 30 kilometres south of Mosul, during an operation against Islamic State (IS) group jihadists to retake the main hub city. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on October 24, 2016 Iraqi families who were displaced by the ongoing operation by Iraqi forces against jihadists of the Islamic State group to retake the city of Mosul, are seen gathering in an area near Qayyarah. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by BULENT KILIC / AFP)

(FILES) In this file photo taken on October 26, 2016 Newly displaced Iraqi's who fled from the city of Mosul, Iraq's last major Islamic State (IS) group stronghold, are reunited with their relatives who came two years ago to the refugee camp in the Khazir area, near near the Kurdish checkpoint of Aksi Kalak, some 40 kilometres east of Arbil following their arrival. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by BULENT KILIC / AFP)

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on November 08, 2016 Members of the Iraqi forces check a body they pulled from a mass grave they discovered in the Hamam al-Alil area after they recaptured the area from Islamic State (IS) group jihadists during the ongoing operation to retake Mosul, the last IS-held Iraqi city. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on November 10, 2016 A displaced Iraqi woman holds her cat, Lulu, as she waits for transport in the Iraqi Kurdish checkpoint village of Shaqouli, about 35 kilometres east of Mosul, after she fled her home with her children in the eastern Intisar neighbourhood of the embattled city to take refuge at a camp in Arbil. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Odd ANDERSEN / AFP)

(FILES) In this file photo taken on November 18, 2016 Iraqi men drop their pants before being allowed to approach a position held by the Iraqi Special Forces' second division in Mosul's eastern district of Karkukli during a massive operation to oust Islamic State group jihadists from the country's second city. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Odd ANDERSEN / AFP)

(FILES) In this file photo taken on November 22, 2016 A picture taken through the bullet-riddled windshield of an Iraqi Special Forces armoured vehicle shows residents walking on a street in the Aden district of Mosul after troops almost entirely retook the area from Islamic State (IS) group jihadists. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by THOMAS COEX / AFP)

(FILES) In this file photo taken on November 30, 2016 Iraqi Shiite fighters from the Hashed al-Shaabi (Popular Mobilisation) paramilitaries fire their weapons as they advance near the town of Tal Abtah, south of Tal Afar during a broad offencive by Iraq forces to retake the city Mosul from jihadists of the Islamic State group. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on December 06, 2016 Suspected Islamic State (IS) and Taliban militants are brought before media during a press conference in Jalalabad. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by NOORULLAH SHIRZADA / AFP)

(FILES) In this file photo taken on January 09, 2017 A displaced Iraqi girl who fled the violence in the Islamic State (IS) group stronghold of Mosul, holds a balloon at the Khazer refugee camp for displaced people near the Kurdish checkpoint of Aski kalak, 40 km West of Arbil, the capital of the autonomous Kurdish region of northern Iraq. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Dimitar DILKOFF / AFP)

(FILES) In this file photo taken on January 18, 2017 taken through the windshield of a Humvee, Iraqis walk in dust while a convoy of armored vehicles passes them in eastern Mosul. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Dimitar DILKOFF / AFP)

(FILES) In this file photo taken on January 19, 2017 Iraqis fleeing the fighting between security forces and militants of the Islamic State (IS) group walk past army vehicles in eastern Mosul during an ongoing military operation against the jihadists. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP) / ALTERNATIVE CROP

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on January 20, 2017 a dead body hangs from an electricity post in eastern Mosul during an ongoing military operation against Islamic State (IS) group jihadists. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Dimitar DILKOFF / AFP)

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on March 10, 2017 People pass by the body of a reported jihadist in west Mosul as Iraqi forces advance in the city in the ongoing battle to seize it from the jihadists of the Islamic State (IS) group. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

EDITORS NOTE: Graphic content / (FILES) This file photo taken on March 10, 2017 shows the body of a reported jihadist in west Mosul, as Iraqi forces advance in the city in the ongoing battle to seize it from the jihadists of the Islamic State (IS) group. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on March 11, 2017, Iraqi forces members fire from outside the museum towards Islamic State (IS) jihadists' positions in west Mosul during the ongoing battle to retake the city from the group. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on March 11, 2017 Iraqi forces fire artillery towards Islamic State (IS) jihadists positions in west Mosul as the ongoing battle to retake the city from the group continues. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on March 12, 2017 Iraqi families leave Mosul's Nablus neighbourhood during an offensive by security forces to retake the western parts of the city from Islamic State (IS) group fighters. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on March 14, 2017 Displaced residents from Mosul's al-Nasser neighbourhood evacuate the area as Iraqi forces continue to advance in the embattled city combatting Islamic State (IS) group jihadists. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on March 16, 2017 Displaced residents evacuate a neighbourhood in West Mosul during the government-led offensive to retake Iraq's second largest city from Islamic State (IS) group jihadists. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on March 16, 2017 Displaced children evacuate a neighbourhood in West Mosul during the government-led offensive to retake Iraq's second largest city from Islamic State (IS) group jihadists. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on March 17, 2017 Relatives mourn over the body on an Iraqi child, killed in an airstrike targetting Islamic State (IS) group jihadists, West Mosul. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file photo taken on March 17, 2017 Relatives mourn as bodies of Iraqi residents of west Mosul killed in an airstrike targeting Islamic State (IS) group jihadists are placed and covered with blankets on carts. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on March 22, 2017 An Iraqi civilian runs towards a man who was injured by a mortar shell fired by Islamic State (IS) group jihadists on civilians who were gathered to receive aid, in Al-Risala neighbourhood as an ongoing offensive by Iraqi forces to retake the city from the group continues. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on March 22, 2017 Iraqi women cry over their brother's body, who was killed by a mortar shell fired by Islamic State (IS) group jihadists on civilians who were gathered to receive aid, in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from the group continues. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on March 22, 2017 An Iraqi girl cries over her father's body, who was killed by a mortar shell fired by Islamic State (IS) group jihadists on civilians who were gathered to receive aid, in Al-Risala neighbourhood as an ongoing offensive by Iraqi forces to retake the city from the group continues. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on October 05, 2017 Fighters from the Hashed al-Shaabi (Popular Mobilisation units), backing the Iraqi forces, pose in front of a mural depicting the emblem of the Islamic State (IS) group as troops advance through Hawija after retaking the city from IS group fighters. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by AHMAD AL-RUBAYE / AFP)

(FILES) In this file photo taken on October 19, 2017 Kurdish female fighters of the Syrian Democratic Forces (SDF) gather during a celebration at the iconic Al-Naim square in Raqa after retaking the city from Islamic State (IS) group fighters. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by BULENT KILIC / AFP)

(FILES) In this file photo taken on October 20, 2017 A woman cries as she looks at her house in Raqa after a Kurdish-led force expelled the Islamic State group from the northern Syrian city. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by BULENT KILIC / AFP)

(FILES) In this file photo taken on April 28, 2018 People stand on a roof to observe explosions in the skyline of a southern district of the Syrian capital Damascus, during regime strikes targeting the Islamic State group in the Palestinian camp of Yarmuk and neighbouring districts. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Rami al SAYED / AFP)

EDITORS NOTE: Graphic content / (FILES) In this file photo taken on April 09, 2017 An Egyptian woman uses her cell phone to take pictures of the destruction, debris, and bloodstains inside the Mar Girgis Coptic Orthodox Church in the Nile Delta City of Tanta, 120 kilometres (75 miles) north of Cairo, at which a bomb blast struck worshippers gathering to attend the Palm Sunday mass. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by STRINGER / AFP)

In this file picture, A shell explodes on November 13, 2014 in the Syrian city of Kobane, also known as Ain al-Arab, as seen from the Turkish border village of Mursitpinar, Sanliurfa province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

In this file picture, Syrian Kurdish refugees that fled the Syrian town of Kobane, also known as Ain al-Arab, walk past tents in a refugee camp in the southeastern town of Suruc, in the Turkish Sanliurfa province, on October 16, 2014. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

In this file picture, A woman reacts as smoke rises from the Syrian town of Ain al-Arab, known as Kobane by the Kurds, after a strike from the US-led coalition as it seen from the Turkish - Syrian border in the southeastern village of Mursitpinar, Sanliurfa province, on October 13, 2014. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

(FILES) In this file picture, People watch smoke rising from the Syrian town of Ain al-Arab, known as Kobane by the Kurds, after an air strike, on October 8, 2014 in the Turkish-Syrian border, in the southeastern village of Mursitpinar, Sanliurfa province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by ARIS MESSINIS / AFP)

In this file image grab taken from a propaganda video released on March 17, 2014 by the Islamic State of Iraq and the Levant (ISIL)'s al-Furqan Media, ISIL fighters allegedly execute a man at an undisclosed location in the Iraqi Anbar province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / AL-FURQAN MEDIA / AFP)

An image grab taken from a propaganda video released on March 17, 2014 by the Islamic State of Iraq and the Levant (ISIL)'s al-Furqan Media allegedly shows ISIL fighters the trademark Jihadists flag as they stand on an armoured vehicle at an undisclosed location in the Anbar province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / AL-FURQAN MEDIA / AFP)

(FILES) In this file image grab taken from a propaganda video released on March 17, 2014 by the Islamic State of Iraq and the Levant (ISIL)'s al-Furqan Media allegedly shows ISIL fighters raising their weapons as they stand on a vehicle mounted with the trademark Jihadists flag at an undisclosed location in the Anbar province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / AL-FURQAN MEDIA / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / HO / AL-FURQAN MEDIA" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS FROM ALTERNATIVE SOURCES, AFP IS NOT RESPONSIBLE FOR ANY DIGITAL ALTERATIONS TO THE PICTURE'S ED

This file image grab taken from a video released by the Islamic State (IS) and identified by SITE Intelligence Group on September 2, 2014 purportedly shows a masked militant holding a knife and gesturing as he speaks to the camera in a desert landscape before beheading 31-year-old US freelance writer Steven Sotloff. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by HO / SITE Intelligence Group / AFP)

(FILES) In this file photo taken on October 23, 2014 A combination of four images show from top left to bottom right:- militants of Islamic State (IS) seen just before and after an explosion from an air strike on Tilsehir hill near the Turkish-Syrian border from Yumurtalik village, in Sanliurfa province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Bulent KILIC / AFP)

In this file picture taqken on July 5, 2014, an image grab taken from a propaganda video released by al-Furqan Media allegedly shows the leader of the Islamic State (IS) jihadist group, Abu Bakr al-Baghdadi, aka Caliph Ibrahim, adressing Muslim worshippers at a mosque in the militant-held northern Iraqi city of Mosul. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by - / AFP)

(FILES) In this file photo taken on October 11, 2014 Kurdish people look at smoke rising from the Syrian town of Ain al-Arab, known as Kobane by the Kurds, from the Turkish-Syrian border, in Mursitpinar, Sanliurfa province. - Kurdish-led forces announced on March 23, 2019 they had fully captured the Islamic State group's last bastion in eastern Syria and declared the total elimination of the jihadists' "caliphate". (Photo by Aris MESSINIS / AFP)

A group look at the Linwood Islamic Centre which remains closed despite the reopening of city's Al Noor mosque, in Christchurch on March 23, 2019. - Muslims returned to Christchurch's main mosque for the first time since a white supremacist launched a massacre of 50 worshippers, as New Zealand sought to return to normal following the searing tragedy. (Photo by WILLIAM WEST / AFP)

A woman looks at tributes left at the Linwood Islamic Centre which remains closed despite the reopening of city's Al Noor mosque, in Christchurch on March 23, 2019. - Muslims returned to Christchurch's main mosque for the first time since a white supremacist launched a massacre of 50 worshippers, as New Zealand sought to return to normal following the searing tragedy. (Photo by WILLIAM WEST / AFP)

Two people look at tributes left at the Linwood Islamic Centre which remains closed despite the reopening of city's Al Noor mosque, in Christchurch on March 23, 2019. - Muslims returned to Christchurch's main mosque for the first time since a white supremacist launched a massacre of 50 worshippers, as New Zealand sought to return to normal following the searing tragedy. (Photo by WILLIAM WEST / AFP)

A policeman stand guard outside the Linwood Islamic Centre which remains closed despite the reopening of city's Al Noor mosque, in Christchurch on March 23, 2019. - Muslims returned to Christchurch's main mosque for the first time since a white supremacist launched a massacre of 50 worshippers, as New Zealand sought to return to normal following the searing tragedy. (Photo by WILLIAM WEST / AFP)

Policemen stand guard outside the Linwood Islamic Centre which remains closed despite the reopening of city's Al Noor mosque, in Christchurch on March 23, 2019. - Muslims returned to Christchurch's main mosque for the first time since a white supremacist launched a massacre of 50 worshippers, as New Zealand sought to return to normal following the searing tragedy. (Photo by WILLIAM WEST / AFP)

Micah Lauren Shin of the US watches his shot during the third round of the 2019 Maybank Malaysia Golf Championship at Saujana Golf and Country Club, in Shah Alam, on the outskirt of Kuala Lumpur on March 23, 2019. (Photo by Mohd Rasfan / AFP)

David Lipsky of the US lines up a putt during the third round of the 2019 Maybank Malaysia Golf Championship at Saujana Golf and Country Club, in Shah Alam, on the outskirt of Kuala Lumpur on March 23, 2019. (Photo by Mohd Rasfan / AFP)