On Jan. 27, 1945, the Soviet Red Army liberated the Auschwitz death camp in German-occupied Poland. The German army had already fled, leaving behind the bodies of prisoners who had been shot and thousands of sick, starving survivors. When the Soviets liberated the camp, they found about 7,000 survivors. Soviet troops also found gas chambers and crematoria the Germans had destroyed in an attempt to hide evidence of their mass killings.  Prisoners arrived in cramped, windowless cattle trains. The notorious