Maj. Gen. Lawrence Wells, 9th Air Force commander, passes the guidon to Col. John J. Allen Jr., the newly appointed 633rd Air Base Wing commander, during the 633rd change of command ceremony at Langley Air Force Base, Va., April 22, 2013. Allen assumed command of the wing from Col. Korvin D. Auch. (U.S. Air Force photo by Staff Sgt. Dana Hill/Released)