U.S. Air Force TECH. SGT. Jay Thompson, from the 142nd Aircraft Maintenance Squadron, Oregon Air National Guard, inspects the tail fin of an F-15C Eagle aircraft, from the 142nd Fighter Wing, for damage during exercise William Tell 2004 at Tyndall Air Force Base, Fla., on Nov. 9, 2004. This is the 50th Anniversary of the William Tell competition, an exercise that tests an aircrew's ability to perform under combat conditions. (USAF PHOTO by MASTER SGT. Robert W. Valenca) (Released)