An F-16 Fighting Falcon takes off while two F-35 Lightning IIs taxi during a training mission April 24, 2014, at Eglin Air Force Base, Fla. F-16s from the 419th and 388th Fighter Wings from Hill AFB, Utah, conducted their first training missions alongside the Air Force’s newest fighter aircraft. (U.S. Air Force photo/Staff Sgt. Christina Judd)