Israeli Prime Minister Benjamin Netanyahu and Israeli President Reuven Rivlin pose with world leaders for a group photo during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

Rabbi Israel Meir Lau Chairman of the Yad Vashem Council speaks to Israeli Prime Minister Benjamin Netanyahu and Russian President Vladimir Putin 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 January 23, 2020. REUTERS/Ronen Zvulun/Pool

Holocaust survivors Rose Moskowitz and Chairperson of the Center Organizations of Holocaust Survivors in Israel Colette Avital light a Memorial Torch during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

U.S. Vice President Mike Pence and Israeli Prime Minister Benjamin Netanyahu speak 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 January 23, 2020. REUTERS/Ronen Zvulun/Pool

French President Emmanuel Macron 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 January 23, 2020. REUTERS/Ronen Zvulun/Pool

Attendees during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

U.S. Speaker of the House Nancy Pelosi during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

U.S. Speaker of the House Pelosi during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

Attendees during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

U.S. Vice President Mike Pence speaks during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

Britain's Prince Charles and French President Emmanuel Macron attend the World Holocaust Forum marking 75 years since the liberation of the Nazi extermination camp Auschwitz, at Yad Vashem Holocaust memorial centre in Jerusalem January 23, 2020. Abir Sultan/Pool via REUTERS

German President Frank-Walter Steinmeier speaks during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

Canada's Governor General Julie Payette 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 January 23, 2020. REUTERS/Ronen Zvulun/Pool

French President Emmanuel Macron speaks during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

Russian President Vladimir Putin attends 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 January 23, 2020. Abir Sultan/Pool via REUTERS

German President Frank-Walter Steinmeier and French President Emmanuel Macron hug 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 January 23, 2020. REUTERS/Ronen Zvulun/Pool

Portugal's President Marcelo Rebelo de Sousa 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 January 23, 2020. REUTERS/Ronen Zvulun/Pool

Dutch King Willem-Alexander with King Philippe of Belgium and King Felipe of Spain during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

Russian President Vladimir Putin speaks during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

Israeli President Reuven Rivlin speaks 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 January 23, 2020. Abir Sultan/Pool via REUTERS

Britain's Prince Charles lays a wreath during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

Israeli President Reuven Rivlin speaks 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 January 23, 2020. Abir Sultan/Pool via REUTERS

A girl holds a torch to light a Memorial Torch during the Fifth World Holocaust Forum at the Yad Vashem Holocaust memorial museum in Jerusalem, January 23, 2020. Abir Sultan/Pool via REUTERS

Russian President Vladimir Putin arrives at Ben Gurion International Airport to attend the World Holocaust Forum at the Yad Vashem memorial centre, near Tel Aviv, Israel January 23, 2020. Oded Balilty/Pool via REUTERS

U.S. Ambassador to Israel David Friedman walks next to U.S. Vice President Mike Pence and his wife Karen after they disembarked from a plane upon their arrival at Ben Gurion International Airport to attend the World Holocaust Forum at the Yad Vashem memorial centre, near Tel Aviv, Israel January 23, 2020. REUTERS/Ammar Awad/Pool