Dignitaries and guests are seen during the Holocaust Remembrance Day commemoration service at the Ghetto Heroes Monument in Warsaw, Poland, Jan. 27, 2019. Sunday marked the 74th anniversary of the liberation of the Auschwitz-Birkenau concentration camp in which over 1.1 million people were exterminated during the Nazi occupation of Poland. In 2005, the UN General Assembly designated January 27, the anniversary of the liberation of Auschwitz-Birkenau, as International Holocaust Remembrance Day. (Xinhua/Jaap Arriens)