Jews from the Lodz ghetto are loaded onto freight trains for deportation to the Chelmno extermination camp. Lodz, Poland, between 1942 and 1944. Photograph »

Main entrance to the Auschwitz-Birkenau extermination camp. Poland, date uncertain. Photograph »

Human remains found in the Dachau concentration camp crematorium after liberation. Germany, April 1945. Photograph »

Two survivors at one of the human-ash pits in the Dora-Mittelbau concentration camp, located near Nordhausen. Germany, April-May 1945. Photograph »

Dr. Fritz Klein, a former camp doctor who conducted medical experiments on prisoners, stands among corpses in a mass grave. Bergen-Belsen, Germany, after April 15, 1945. Photograph »

Soviet officials view stacked corpses of victims at the Klooga camp. Due to the rapid advance of Soviet forces, the Germans did not have time to burn the corpses. Klooga, Estonia, 1944. Photograph »

The valuables displayed here were confiscated from prisoners by German guards at the Buchenwald concentration camp and later found by American forces after the liberation of the camp. Buchenwald, Germany, after April 1945. Photograph »

After the liberation of the Flossenbürg concentration camp, two US army infantrymen examine a pile of shoes belonging to victims of the camp. Flossenbürg, Germany, May 1945. Photograph »

Zyklon B pellets found at the liberation of the Majdanek camp. Poland, after July 1944. Photograph »

Generals Eisenhower, Patton, and Bradley view corpses of inmates at Ohrdruf, a subcamp of Buchenwald. Germany, April 12, 1945. Photograph »