A member of an association of Auschwitz concentration camp survivors lays her hand at the execution wall at the former Auschwitz concentration camp in Oswiecim, Poland on Jan. 27, 2015. The "wall of death" was used to beat and torment prisoners before ultimately killing them. It estimated that at least 20,000 people were killed at this very wall alone.
Survivors visit Auschwitz 70 years since liberation - Photos - Auschwitz survivors visit camp 70 years since liberation
About 1.5 million people, most of them Jews, were killed at the Nazi camp which has become a symbol of the horrors of the Holocaust and WWII. Here, delegation and survivors make their way through Auschwitz concentration camp to lay candles at the Birkenau Memorial in Oswiecim, Poland on Jan. 27, 2015.
On Jan. 27, 1945, the Nazi concentration camp Auschwitz was liberated by the Soviet Red Army troops after a staggering 1.5 million people, most of them Jews, were killed at the camp. 70 years later, survivors return to the former concentration camp for memorial services.
70th anniversary of the Auschwitz liberation - Photos - Remembering the horrors of Auschwitz 70 years later
The original entrance gate to the former Auschwitz-Birkenau concentration camp stands encased under a tent during ceremonies marking the 70th anniversary of the liberation of Auschwitz in Oswiecim, Poland on Jan. 27, 2015.