The Holocaust began when Hitler rose to power in Germany and the Nazis used propaganda to isolate Jews from society. Jews were confined to ghettos and eventually transported to concentration camps where many were killed or subjected to cruel medical experiments. The "Final Solution" sought to exterminate all Jews under Nazi control through concentration camps and killing centers like Auschwitz. By 1945, around 6 million Jews and millions of others had been murdered before the camps were liberated. However, some still deny the historical facts of the Holocaust.