<P> Most commonly, only the first verse is performed, though in professional performances all four verses may be presented . The song is often sung at Air Force - related functions, and is sung before Physical Training (PT) exercise by basic trainees at Lackland Air Force Base . Although not the Academy's official fight song, the first verse of the song is also frequently played at United States Air Force Academy sporting events and at other Academy functions, such as parades . </P> <P> The third verse ("Here's a toast ...") has a different melody, and a more reverent mood than the rest of the song to commemorate those who have fallen in the service of the Air Force and the United States . This verse is sometimes performed independently of the other verses . The third verse is sung by itself after most Academy sporting events, with the entire Cadet Wing participating after a football game . It is sung in conjunction with Army's Alma Mater and Navy's Blue and Gold, when the teams combine to participate in the singing of both Academies' songs . The third verse is also traditionally sung by Academy cadets and graduates as an alma matter to honor the passing of a fellow cadet or graduate . </P> <P> Following the initial change on June 20, 1941 of the American air army's name from "Army Air Corps" to "Army Air Force (s)", to the post-World War II 1947 establishment of the separate "U.S. Air Force", an attempt was made to change the sixth line of each verse so that the last word rhymed with "force" instead of "corps". Thus, "Off with one helluva roar!" became "Off on one helluva course!"; "Gave us wings, ever to soar!" became "Gave our wings every resource!"; and "We'll be there, followed by more!" became "We'll be there, ever on course!" </P> <P> These changes appeared in the 1972 edition of the USAF publication Air Force Customs and Courtesies but were never popular, and the lyrics were later reverted without fanfare in later editions . </P>

What are the lyrics to the air force song