Buchenwald camp was one of the most terrible, over a million people were killed here
© AP Photo/File Buchenwald concentration camp liberation in April 1945
© AP Photo The first concentration camp in Germany, Dachau, was founded in March 1933. Photo: prisoners at the electric fence of Dachau concentration camp greeting Allied troops
© AP Photo, File Women and their newborn children after the liberation of the Dachau concentration camp
© EPA/WDR / USHMM / HANDOUT Children at the Auschwitz concentration camp
© Fotokhronika TASS UN Secretary-General Ban Ki-moon walks along the barbed wire fence at the former German Nazi Concentration Camp Auschwitz
© EPA/EVAN SCHNEIDER / UN HANDOUT Belzec in Poland was the site of the first of the Nazi German death camps. Photo: an old Israeli put a candle light at the Memorial Site in the Belzec death camp
© EPA/Miroslaw Trembecki Artificial mountain at the vast new memorial for the victims of the Belzec Nazi death camp
© AP Photo/Czarek Sokolowski Children at a German concentration camp in the USSR, 1942
© Fotokhronika TASS/reproduction