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Serbian military honor guard attend commemorations for victims of the Holocaust at a monument erected in the former World War II Nazi concentration camp of Sajmiste in Belgrade, Serbia, Sunday, Jan. 27, 2013. The ceremony coincided with International Holocaust Remembrance Day, which marks the liberation of the Auschwitz Nazi concentration camp on Jan. 27, 1945. (AP Photo/Darko Vojinovic)

Holocaust Remembrance Day

International Holocaust Remembrance Day marks the liberation of the Auschwitz Nazi concentration camp on Jan. 27, 1945. Holocaust survivors, politicians, religious leaders and others marked the day with prayers.