BIRMINGHAM, Ala. -- A KC-135R aircraft flies in five-ship formation flight here on Saturday. Four of the KC-135s refueled A-10 aircraft. The fifth KC-135R returned to base after the formation training was complete. A KC-135R from the 171st Air Refueling Wing in Pittsburgh, Pa. was flown in the formation and was used during the refueling mission. (U.S. Air National Guard photo by Tech. Sgt. Jon Roebuck/Released)