Auschwitz: pourquoi les Alliés n'ont pas stoppé la Shoah plus tôt? [ENG SUBS] [UNCENSORED]

Did The Allies know about the Concentration Camps

Could the Holocaust have been stopped sooner? Photographed during the war by an Allied aircraft, the Auschwitz Nazi extermination center continued to operate at full speed until its liberation by the Soviets on January 27, 1945. More than a million Jews were killed there.

What did the Allies of the Holocaust really know? What was their reaction?