Israeli Defense Forces Chief Cantor Shai Ambramson, left, speaks during the World Holocaust Forum in Jerusalem, Thursday, Jan. 23, 2020. U.S. Vice President Mike Pence, Russian President Vladimir Putin, French President Emmanuel Macron, and the presidents of Germany, Italy and Austria were among the more than 40 dignitaries attending the World Holocaust Forum, which coincides with the 75th anniversary of the liberation of the Auschwitz death camp. (Abir Sultan/Pool Photo via AP)

A girl holds a torch to light a Memorial Torch during a ceremony at the World Holocaust Forum in Jerusalem, Thursday, Jan. 23, 2020. U.S. Vice President Mike Pence, Russian President Vladimir Putin, French President Emmanuel Macron, and the presidents of Germany, Italy and Austria were among the more than 40 dignitaries attending the World Holocaust Forum, which coincides with the 75th anniversary of the liberation of the Auschwitz death camp. (Abir Sultan/Pool Photo via AP)

Holocaust survivors Rose Moskowitz, right, and Chairperson of the Center Organizations of Holocaust Survivors in Israel Colette Avital, left, light a Memorial Torch during a ceremony at the World Holocaust Forum in Jerusalem, Thursday, Jan. 23, 2020. U.S. Vice President Mike Pence, Russian President Vladimir Putin, French President Emmanuel Macron, and the presidents of Germany, Italy and Austria were among the more than 40 dignitaries attending the World Holocaust Forum, which coincides with the 75th anniversary of the liberation of the Auschwitz death camp. (Abir Sultan/Pool Photo via AP)

World leaders pose for a family photo during the World Holocaust Forum in Jerusalem, Thursday, Jan. 23, 2020. U.S. Vice President Mike Pence, Russian President Vladimir Putin, French President Emmanuel Macron, and the presidents of Germany, Italy and Austria were among the more than 40 dignitaries attending the World Holocaust Forum, which coincides with the 75th anniversary of the liberation of the Auschwitz death camp. (Abir Sultan/Pool Photo via AP)

Slovenia's President Borut Pahor takes part in a wreath-laying ceremony at the World Holocaust Forum marking 75 years since the liberation of the Nazi extermination camp Auschwitz, at Yad Vashem Holocaust memorial centre in Jerusalem, Thursday, Jan. 23, 2020. (Ronen Zvulun, Pool via AP)

President of Iceland President Guoni Thorlacius Johannesson takes part in a wreath-laying ceremony at the World Holocaust Forum marking 75 years since the liberation of the Nazi extermination camp Auschwitz, at Yad Vashem Holocaust memorial centre in Jerusalem, Thursday, Jan. 23, 2020. (Ronen Zvulun, Pool via AP)

Italy's President Sergio Mattarella takes part in a wreath-laying ceremony at the World Holocaust Forum marking 75 years since the liberation of the Nazi extermination camp Auschwitz, at Yad Vashem Holocaust memorial centre in Jerusalem, Thursday, Jan. 23, 2020. (Ronen Zvulun, Pool via AP)

Latvia's Speaker of the Saeima, Inara Murniece takes part in a wreath-laying ceremony at the World Holocaust Forum marking 75 years since the liberation of the Nazi extermination camp Auschwitz, at Yad Vashem Holocaust memorial centre in Jerusalem, .Thursday, Jan. 23, 2020. (Ronen Zvulun, Pool via AP)

Denmark's Prime Minister Mette Frederiksen takes part in a wreath-laying ceremony at the World Holocaust Forum marking 75 years since the liberation of the Nazi extermination camp Auschwitz, at Yad Vashem Holocaust memorial centre in Jerusalem,Thursday, Jan. 23, 2020. (Ronen Zvulun, Pool via AP)

Palestinian President Mahmoud Abbas, right, shakes hands with Russian President Vladimir Putin during their meeting at the Palestinian Authority headquarters in the West Bank city of Bethlehem, Thursday, Jan 23, 2020. Putin visits Bethlehem after he attended the Fifth World Holocaust Forum in Jerusalem. (Alexander Nemenov, Pool via AP)

Palestinian President Mahmoud Abbas, right, shakes hands with Russian President Vladimir Putin during their meeting at the Palestinian Authority headquarters in the West Bank city of Bethlehem, Thursday, Jan 23, 2020. Putin visits Bethlehem after he attended the Fifth World Holocaust Forum in Jerusalem. (Alexander Nemenov, Pool via AP)

Palestinian President Mahmoud Abbas, left, walks with Russian President Vladimir Putin during their meeting at the Palestinian Authority headquarters in the West Bank city of Bethlehem, Thursday, Jan 23, 2020. Putin visits Bethlehem after he attended the Fifth World Holocaust Forum in Jerusalem. (Alexander Nemenov, Pool via AP)

Palestinian President Mahmoud Abbas, left, walks with Russian President Vladimir Putin during their meeting at the Palestinian Authority headquarters in the West Bank city of Bethlehem, Thursday, Jan 23, 2020. Putin visits Bethlehem after he attended the Fifth World Holocaust Forum in Jerusalem. (Alexander Nemenov, Pool via AP)

Palestinian President Mahmoud Abbas, right, shakes hands with Russian President Vladimir Putin during their meeting at the Palestinian Authority headquarters in the West Bank city of Bethlehem, Thursday, Jan 23, 2020. Putin visits Bethlehem after he attended the Fifth World Holocaust Forum in Jerusalem. (Alexander Nemenov, Pool via AP)

Israeli President Reuven Rivlin (R) welcomes King Felipe VI of Spain at his residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

Israeli President Reuven Rivlin (R) welcomes King Felipe VI of Spain at his residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

Israeli President Reuven Rivlin (R) meets with King Felipe VI of Spain at his residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

Israeli President Reuven Rivlin (L) welcomes King Felipe VI of Spain at his residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

Israeli President Reuven Rivlin (C-R) welcomes King Felipe VI (C-L) of Spain at his residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

King Felipe VI (L) of Spain signs the guest book at Israeli President Reuven Rivlin's (R) residence in Jerusalem, during their meeting ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

King Felipe VI of Spain signs the guest book at the Israeli president's (R) residence in Jerusalem, during their meeting ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

King Felipe VI (L) of Spain signs the guest book at Israeli President Reuven Rivlin's (R) residence in Jerusalem, during their meeting ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

King Felipe VI of Spain is pictured during his meeting with the Israeli president at the latter's residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

King Felipe VI of Spain is pictured during his meeting with the Israeli president at the latter's residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu (R) and his wife Sarah receive Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu (R) and his wife Sarah receive Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu (R) and his wife Sarah receive Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu (R) and his wife Sarah receive Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu (R) and his wife Sarah receive Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Britain's Prince Charles (R), Prince of Wales, meets with Holocaust survivors George Shefi and Marta Wise during a reception at the Israel museum in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by Menahem KAHANA / AFP)

Britain's Prince Charles (R), Prince of Wales, meets with Holocaust survivors George Shefi and Marta Wise during a reception at the Israel museum in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by Menahem KAHANA / AFP)

Britain's Prince Charles (R), Prince of Wales, meets with Holocaust survivors George Shefi and Marta Wise during a reception at the Israel museum in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by Menahem KAHANA / AFP)

Britain's Prince Charles (C), Prince of Wales, meets with Holocaust survivors George Shefi (L) and Marta Wise during a reception at the Israel museum in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by MENAHEM KAHANA / AFP)

Britain's Prince Charles (C), Prince of Wales, meets with Holocaust survivors George Shefi (L) and Marta Wise during a reception at the Israel museum in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by MENAHEM KAHANA / AFP)

King Felipe VI of Spain signs the guest book at the Israeli president's (R) residence in Jerusalem, during their meeting ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

King Felipe VI of Spain signs the guest book at the Israeli president's (R) residence in Jerusalem, during their meeting ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

King Felipe VI of Spain signs the guest book at the Israeli president's (R) residence in Jerusalem, during their meeting ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

Israeli President Reuven Rivlin (R) welcomes King Felipe VI of Spain at his residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

King Felipe VI of Spain is pictured during his meeting with the Israeli president at the latter's residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

King Felipe VI of Spain is pictured during his meeting with the Israeli president at the latter's residence in Jerusalem, ahead of the Fifth World Holocaust Forum on January 23, 2020. - Israel is hosting today dozens of world leaders to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by ATEF SAFADI / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu (R) and his wife Sarah smile as the mother of Naama Issachar, who is imprisoned in Russia, shakes hands with Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu alongside his wife Sarah and the mother of Naama Issachar, who is imprisoned in Russia, meet with Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu alongside his wife Sarah and the mother of Naama Issachar, who is imprisoned in Russia, meet with Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu alongside his wife Sarah receive Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu alongside his wife Sarah and the mother of Naama Issachar, who is imprisoned in Russia, meet with Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu alongside his wife Sarah receive Russian President Vladimir Putin in Jerusalem on January 23, 2020 ahead of the World Holocaust Forum. - Israel hosts dozens of world leaders today to mark 75 years since the liberation of Auschwitz, the World War II death camp where the Nazis killed more than 1.1 million people, most of them Jews. (Photo by HEIDI LEVINE / POOL / AFP)

Israel's President Reuven Rivlin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israel's President Reuven Rivlin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israel's President Reuven Rivlin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israel's President Reuven Rivlin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israel's President Reuven Rivlin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin greets counterparts and officials attending the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin attends the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Britain's Prince Charles, Prince of Wales, looks on during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli President Reuven Rivlin (L) walks with his Russian counterpart Vladimir Putin (C) during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli President Reuven Rivlin (L) walks with his Russian counterpart Vladimir Putin (C) during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli President Reuven Rivlin (L) walks with his Russian counterpart Vladimir Putin (C) during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

French President Emmanuel Macron (L) and Britain's Prince Charles, Prince of Wales, (C) look on during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

French President Emmanuel Macron (L) and Britain's Prince Charles, Prince of Wales, (C) look on during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israel's President Reuven Rivlin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israel's President Reuven Rivlin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli President Reuven Rivlin, alongside Israeli Prime Minister Benjamin Netanyahu, shakes hands with Russian President Vladimir Putin during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli President Reuven Rivlin, alongside Israeli Prime Minister Benjamin Netanyahu, shakes hands with Russian President Vladimir Putin during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Israeli Prime Minister Benjamin Netanyahu greets Russian President Vladimir Putin during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

US Vice President Mike Pence delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

US Vice President Mike Pence delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

US Vice President Mike Pence delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

US Vice President Mike Pence delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

US Vice President Mike Pence delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by ABIR SULTAN / POOL / AFP)

US Vice President Mike Pence delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

US Vice President Mike Pence delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Moshe Kantor, President of the World Holocaust Forum Foundation, delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

Russian President Vladimir Putin delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Britain's Prince Charles delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

Britain's Prince Charles delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

German President Frank-Walter Steinmeier delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

Britain's Prince Charles delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Britain's Prince Charles delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Britain's Prince Charles delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Britain's Prince Charles delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

German President Frank-Walter Steinmeier delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

Britain's Prince Charles delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

German President Frank-Walter Steinmeier delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Britain's Prince Charles delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

US Vice President Mike Pence delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

German President Frank-Walter Steinmeier (L) greets Israeli Prime Minister Benjamin Netanyahu (R) delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

German President Frank-Walter Steinmeier (L) and French President Emmanuel Macron (C) hug as Israeli President Reuven Rivlin (R) looks on during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

French President Emmanuel Macron delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

US Vice President Mike Pence (L) greets Israeli Prime Minister Benjamin Netanyahu during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

US Speaker of the House Nancy Pelosi looks on during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

German President Frank-Walter Steinmeier delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by ABIR SULTAN / POOL / AFP)

German President Frank-Walter Steinmeier delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

German President Frank-Walter Steinmeier delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

German President Frank-Walter Steinmeier delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

German President Frank-Walter Steinmeier delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

German President Frank-Walter Steinmeier delivers a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by Abir SULTAN / POOL / AFP)

Rabbi Israel Meir Lau, Chairman of the Yad Vashem Council walks to the podium to give a speech during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

Rabbi Israel Meir Lau (L) Chairman of the Yad Vashem Council speaks to Israeli Prime Minister Benjamin Netanyahu (C) and Russian President Vladimir Putin (R) during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)

Rabbi Israel Meir Lau, Chairman of the Yad Vashem Council speaks during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem on January 23, 2020. - World leaders travelled to Israel this week to mark 75 years since the Red Army liberated Auschwitz, the extermination camp where the Nazis killed over a million Jews. (Photo by RONEN ZVULUN / POOL / AFP)