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Stones lie on an Auschwitz-Birkenau memorial stone at Buchenwald, the former Nazi concentration camp near Weimar, Germany, on International Holocaust Remembrance Day, Monday, Jan. 27, 2014, marking the 69th anniversary since the Soviet Red Army liberated the camp in Oswiecim, Poland. (AP Photo/Jens Meyer)
Stones lie on an Auschwitz-Birkenau memorial stone at Buchenwald, the former Nazi concentration camp near Weimar, Germany, on International Holocaust Remembrance Day, Monday, Jan. 27, 2014, marking the 69th anniversary since the Soviet Red Army liberated the camp in Oswiecim, Poland. (AP Photo/Jens Meyer)