Maj. Gen. John C. Flournoy, Jr., Commander, 4th Air Force, passes the flag of the 349th Air Mobility Wing to Col. Raymond A. Kozak in a change of command ceremony at Travis Air Force Base, Calif., Aug. 8, 2015. Kozak will lead more than 3,100 combat-ready Citizen Airmen, flying and maintaining the C-17 Globemaster III, C-5 Galaxy and KC-10 Extender mobility aircraft. (U.S. Air Force photo/Ken Wright)