Gen. Carlton D. Everhart II, Air Mobility Command commander, passes the 18th Air Force guidon to Lt. Gen. Giovanni Tuck, the new 18th Air Force commander, during a change of command ceremony at the Scott Event Center, Scott Air Force Base, Illinois, June 1, 2017. Tuck comes to 18th Air Force from U.S. Transportation Command where he served as the Director of Operations and Plans. As 18th AF commander, Tuck is responsible for the command's worldwide operational mission of providing rapid global mobility and sustainment for America's armed forces through airlift, aerial refueling, aeromedical evacuation and contingency response. (U.S. Air Force photo by Master Sgt. Thomas J. Doscher)