In January 1944, Reagan was ordered to temporary duty in New York City to participate in the opening of the Sixth War Loan Drive, which campaigned for the purchase of war bonds. He was reassigned to the First Motion Picture Unit on November 14, 1944, where he remained until the end of World War II. By the end of the war, his units had produced some 400 training films for the Air Force, including cockpit simulations for B-29 crews scheduled to bomb Japan. He was separated from active duty on December 9, 1945, as an Army captain. While he was in the service, Reagan obtained a film reel depicting the liberation of the Auschwitz concentration camp; he held on to it, believing that doubts would someday arise as to whether the Holocaust had occurred.