Gen. Paul J. Selva accepts the Air Mobility Command guidon from Gen. Mark A. Welsh III, Chief of staff of the Air Force, during the change of command ceremony at Scott Air Force Base, Ill., Nov. 30, 2012. Selva was previously assigned as the assistant to the Chairman of the Joint Chiefs of Staff in Washington D.C. The outgoing commander, Gen. Raymond E. Johns Jr., served 35 years in the Air Force, commanding more than 130,000 Airmen as well as reaching 4,500 flight hours in various aircraft. (U.S. Air Force photo/Staff Sgt. Ryan Crane)