Representatives of various religious congregations prior to the prayer and tribute service at the Monument to the Victims at the former Nazi German concentration and extermination camp Auschwitz II-Birkenau, on International Holocaust Remembrance Day in Oswiecim, Poland, Saturday, Jan. 27, 2018 Saturday is also the 73rd anniversary of the liberation of Auschwitz-Birkenau by the Soviet army. (AP Photo/Czarek Sokolowski)