After enlisting, Stewart made no new commercial films, although he remained under contract to MGM. His public appearances were limited to engagements for the Army Air Forces. The Air Corps scheduled him on network radio with Edgar Bergen and Charlie McCarthy, and to the radio program "We Hold These Truths", a celebration of the United States Bill of Rights, which was broadcast a week after the attack on Pearl Harbor. Stewart also appeared in a First Motion Picture Unit short film, "Winning Your Wings", to help recruit airmen. Nominated for an Academy Award for Best Documentary in 1942, it appeared in movie theaters nationwide beginning in late May 1942 and resulted in 150,000 new recruits.