“Keep ‘Em Flying” vintage style military aviation travel posters found exclusively at – Squadron Posters! These posters are based on the WWII “buy war bonds” posters. Keep ‘Em Flying is also a 1941 film starring the comedy team of Abbott and Costello. The film was the third service comedy based on the peacetime draft of 1940. The film’s title is taken from the official motto of the U.S. Army Air Corps, some five months after it had been reformed into the United States Army Air Forces (USAAF).