U.S. Air Force Col. Mastin, 1st Fighter Wing vice commander, taxis in a T-38 Talon for the final time, at Langley Air Force Base, Va., June 13, 2012. The "fini" flight is an Air Force tradition that can be traced back to the Vietnam War when aircrews celebrated completing 100 combat missions. (U.S. Air Force photo by Staff Sgt. Ashley Hawkins/Released)