New 38th Aerial Port Squadron commander Maj. Calvin Coker (second from right) renders a salute to 315th Mission Support Group commander Col. Bobby Degregorio during a change of command ceremony Sunday, Oct. 6, 2019, in the cargo terminal at Joint Base Charleston, S.C. Coker took command of the unit from outgoing commander Lt. Col. Jay Snyder. (U.S. Air Force photo by Capt. Rashard Coaxum)