Today is International Holocaust Remembrance Day as well as the 80th anniversary of the liberation of Auschwitz
Millions of innocent lives were taken - but their stories must never be lost.
We remember, so history is never repeated - some of these images are difficult to view, but it is necessary that they are seen
1. Survivors of the Dachau concentration camp demonstrate the operation of the crematorium by dragging a corpse towards one of the ovens in a crematorium, 1945.
2. The bodies of former prisoners stacked outside the crematorium in the newly-liberated Buchenwald concentration camp, April 23, 1945.
3. The charred corpse of a prisoner killed by the SS in a barn just outside of Galdelegen, Germany, 1945.