People walk through the gate of the Sachsenhausen Nazi death camp with the phrase 'Arbeit macht frei' (work sets you free) at the eve of the International Holocaust Remembrance Day, in Oranienburg, about 30 kilometers, (18 miles) north of Berlin, Jan. 26, 2015.
Stones lie on a Auschwitz-Birkenau memorial stone during the international Holocaust remembrance day in the former Nazi concentration camp Buchenwald near Weimar, Germany, Jan. 27, 2015.
Auschwitz survivor Miroslaw Celka walks out the gate with the sign saying "Work makes you free" after paying tribute to fallen comrades at the "death wall" execution spot in the former Auschwitz concentration camp in Oswiecim, Poland, on the 70th annivers
Auschwitz-Birkenau Holocaust survivor Tomy Shacham pose next to a photograph that shows him, on the left, on Jan. 27, 1945, during the International Holocaust Remembrance day ceremony in the Massuah international institute for holocaust studies in Kibbutz.
US film director Steven Spielberg, front row, second left, applauds while sitting in a tent raised at the entrance of the Birkenau Nazi death camp in Oswiecim, Poland during the official remembrance ceremony, Jan. 27, 2015.
Holocaust survivors watch suspended screens in a tent raised at the entrance of the Birkenau Nazi death camp in Oswiecim, Poland during the official remembrance ceremony, Jan. 27, 2015.