A Ukrainian International Airline company worker reacts during a briefing at Borispil international airport outside Kyiv, Ukraine, Wednesday, Jan. 8, 2020. A Ukrainian airplane carrying 176 people crashed on Wednesday shortly after takeoff from Tehran's main airport, killing all onboard, Iranian state TV and officials in Ukraine said. (AP Photo/Efrem Lukatsky)

Ukraine International Airlines company president, Yevhenii Dykhne attends a briefing at Borispil international airport outside Kyiv, Ukraine, Wednesday, Jan. 8, 2020. A Ukrainian airplane carrying 176 people crashed on Wednesday shortly after takeoff from Tehran's main airport, killing all onboard, Iranian state TV and officials in Ukraine said. (AP Photo/Efrem Lukatsky)

A relative of one of the flight crew members of the Ukrainian 737-800 plane that crashed on the outskirts of Tehran, kisses a portrait of her at a memorial inside Borispil international airport outside Kyiv, Ukraine, Wednesday, Jan. 8, 2020. A Ukrainian airplane carrying 176 people crashed on Wednesday shortly after takeoff from Tehran's main airport, killing all onboard, Iranian state TV and officials in Ukraine said. (AP Photo/Efrem Lukatsky)

A relative of one of the flight crew members of the Ukrainian 737-800 plane that crashed on the outskirts of Tehran, kisses a portrait of her at a memorial inside Borispil international airport outside Kyiv, Ukraine, Wednesday, Jan. 8, 2020. A Ukrainian airplane carrying 176 people crashed on Wednesday shortly after takeoff from Tehran's main airport, killing all onboard, Iranian state TV and officials in Ukraine said. (AP Photo/Efrem Lukatsky)

Colleagues of the flight crew members of the Ukrainian 737-800 plane that crashed on the outskirts of Tehran, light candles at a memorial inside Borispil international airport outside Kyiv, Ukraine, Wednesday, Jan. 8, 2020. A Ukrainian airplane carrying 176 people crashed on Wednesday shortly after takeoff from Tehran's main airport, killing all onboard, Iranian state TV and officials in Ukraine said. (AP Photo/Efrem Lukatsky)

A relative of passengers and crew members of the crashed Ukraine International Airlines Flight PS752 reacts at the Boryspil airport outside Kiev on January 8, 2020. - All passengers and crew on board the Ukrainian Boeing 737 plane that crashed shortly after take-off from Tehran on January 8, 2020 were killed, Ukrainian President Volodymyr Zelensky said. (Photo by Sergei Supinsky / AFP)

An arrivals board shows the Ukraine International Airlines Flight PS752 marked as cancelled at the Boryspil airport outside Kiev on January 8, 2020. - All passengers and crew on board the Ukrainian Boeing 737 plane that crashed shortly after take-off from Tehran on January 8, 2020 were killed, Ukrainian President Volodymyr Zelensky said. (Photo by SERGEI SUPINSKY / AFP)

A woman uses a smartphone as she walks past an arrivals board displaying the Ukraine International Airlines Flight PS752 from Tehran marked as cancelled at the Boryspil airport outside Kiev on January 8, 2020. - All passengers and crew on board the Ukrainian Boeing 737 plane that crashed shortly after take-off from Tehran on January 8, 2020 were killed, Ukrainian President Volodymyr Zelensky said. (Photo by Sergei Supinsky / AFP)

A relative of passengers and crew members of the crashed Ukraine International Airlines Flight PS752 reacts at the Boryspil airport outside Kiev on January 8, 2020. - All passengers and crew on board the Ukrainian Boeing 737 plane that crashed shortly after take-off from Tehran on January 8, 2020 were killed, Ukrainian President Volodymyr Zelensky said. (Photo by Sergei Supinsky / AFP)

President of Ukraine International Airlines company Yevgen Dykhne reacts during his press-conference at airport Kiev's airport of Boryspil on January 8, 2020. - A Ukrainian airliner carrying 176 people from seven countries crashed shortly after takeoff from Tehran on Wednesday, killing all on board. The vast majority of the passengers on the Boeing 737, which had been flying from Tehran to Kiev for Ukraine International Airlines, were Iranians and Canadians, officials in Kiev said. The crash occured with tensions high in the Middle East and shortly after Tehran launched missiles at US bases in Iraq. (Photo by Sergei SUPINSKY / AFP)

President of Ukraine International Airlines company Yevgen Dykhne reacts during his press-conference at airport Kiev's airport of Boryspil on January 8, 2020. - A Ukrainian airliner carrying 176 people from seven countries crashed shortly after takeoff from Tehran on Wednesday, killing all on board. The vast majority of the passengers on the Boeing 737, which had been flying from Tehran to Kiev for Ukraine International Airlines, were Iranians and Canadians, officials in Kiev said. The crash occured with tensions high in the Middle East and shortly after Tehran launched missiles at US bases in Iraq. (Photo by Sergei SUPINSKY / AFP)

President of Ukraine International Airlines company Yevgen Dykhne reacts during his press-conference at airport Kiev's airport of Boryspil on January 8, 2020. - A Ukrainian airliner carrying 176 people from seven countries crashed shortly after takeoff from Tehran on Wednesday, killing all on board. The vast majority of the passengers on the Boeing 737, which had been flying from Tehran to Kiev for Ukraine International Airlines, were Iranians and Canadians, officials in Kiev said. The crash occured with tensions high in the Middle East and shortly after Tehran launched missiles at US bases in Iraq. (Photo by Sergei SUPINSKY / AFP)

President of Ukraine International Airlines company Yevgen Dykhne (3L) and other representatives of the company react during the press-conference at airport Kiev's airport of Boryspil on January 8, 2020. - A Ukrainian airliner carrying 176 people from seven countries crashed shortly after takeoff from Tehran on Wednesday, killing all on board. The vast majority of the passengers on the Boeing 737, which had been flying from Tehran to Kiev for Ukraine International Airlines, were Iranians and Canadians, officials in Kiev said. The crash occured with tensions high in the Middle East and shortly after Tehran launched missiles at US bases in Iraq. (Photo by Sergei SUPINSKY / AFP)

A father of a crew member of the crashed Ukraine International Airlines Flight PS752 reacts at the Boryspil airport outside Kiev on January 8, 2020. - A Ukrainian airliner carrying 176 people from seven countries crashed shortly after takeoff from Tehran on Wednesday, killing all on board. The vast majority of the passengers on the Boeing 737, which had been flying from Tehran to Kiev for Ukraine International Airlines, were Iranians and Canadians, officials in Kiev said. The crash occured with tensions high in the Middle East and shortly after Tehran launched missiles at US bases in Iraq. (Photo by Sergei SUPINSKY / AFP)

A women reacts at the arrival gate of the Boryspil airport outside Kiev on January 8, 2020. - A Ukrainian airliner carrying 176 people from seven countries crashed shortly after takeoff from Tehran on Wednesday, killing all on board. The vast majority of the passengers on the Boeing 737, which had been flying from Tehran to Kiev for Ukraine International Airlines, were Iranians and Canadians, officials in Kiev said. The crash occured with tensions high in the Middle East and shortly after Tehran launched missiles at US bases in Iraq. (Photo by Sergei SUPINSKY / AFP)

January 8, 2020, Borispyl, Ukraine: An elderly man whose son Igor crashed on the plane at Boryspil International airport..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. 08 Jan 2020 Pictured: January 8, 2020, Borispyl, Ukraine: An elderly man whose son Igor crashed on the plane at Boryspil International airport..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

January 8, 2020, Borispyl, Ukraine: An elderly man whose son Igor crashed on the plane at Boryspil International airport..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. 08 Jan 2020 Pictured: Kiev flight of Ukraine???Z"s international airline..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

January 8, 2020, Borispyl, Ukraine: An elderly man whose son Igor crashed on the plane at Boryspil International airport..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. 08 Jan 2020 Pictured: January 8, 2020, Borispyl, Ukraine: An employee of Ukraine???Z"s International Airlines with people at Borispyl International airport..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

January 8, 2020, Borispyl, Ukraine: An elderly man whose son Igor crashed on the plane at Boryspil International airport..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. 08 Jan 2020 Pictured: January 8, 2020, Borispyl, Ukraine: Parents to a deceased man from the plane crash with an employee of Ukraine International Airlines..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

January 8, 2020, Borispyl, Ukraine: An elderly man whose son Igor crashed on the plane at Boryspil International airport..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. 08 Jan 2020 Pictured: January 8, 2020, Borispyl, Ukraine: Departure board at Boryspil Airport Works as usual..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

January 8, 2020, Borispyl, Ukraine: An elderly man whose son Igor crashed on the plane at Boryspil International airport..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. 08 Jan 2020 Pictured: Kiev flight of Ukraine???Z"s international airline..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

January 8, 2020, Borispyl, Ukraine: An elderly man whose son Igor crashed on the plane at Boryspil International airport..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. 08 Jan 2020 Pictured: January 8, 2020, Borispyl, Ukraine: A passenger flying from Boryspil Airport using his smartphone..Boeing 737 crashed after taking off from Tehran's airport on 8 January, 187 passengers and crew were killed, as media reported. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342

KIEV, UKRAINE - JANUARY 08: A screen with information and cancelled flight from Tehran marked are seen at the Boryspil International Airport near Kiev in Ukraine on January 8, 2020. Ukrainian plane Boeing 737 crashed after taking off from Tehran's Imam Khomeini airport on 8 January 2020. Vladimir Shtanko / Anadolu Agency/ABACAPRESS.COM

KIEV, UKRAINE - JANUARY 08: A screen with information and cancelled flight from Tehran marked are seen at the Boryspil International Airport near Kiev in Ukraine on January 8, 2020. Ukrainian plane Boeing 737 crashed after taking off from Tehran's Imam Khomeini airport on 8 January 2020. Vladimir Shtanko / Anadolu Agency/ABACAPRESS.COM

KIEV, UKRAINE - JANUARY 08: A screen with information and cancelled flight from Tehran marked are seen at the Boryspil International Airport near Kiev in Ukraine on January 8, 2020. Ukrainian plane Boeing 737 crashed after taking off from Tehran's Imam Khomeini airport on 8 January 2020. Vladimir Shtanko / Anadolu Agency/ABACAPRESS.COM

KIEV, UKRAINE - JANUARY 08: A screen with information and cancelled flight from Tehran marked are seen at the Boryspil International Airport near Kiev in Ukraine on January 8, 2020. Ukrainian plane Boeing 737 crashed after taking off from Tehran's Imam Khomeini airport on 8 January 2020. Vladimir Shtanko / Anadolu Agency/ABACAPRESS.COM