Lt. Col. Joseph Thomas, 628th Force Support Squadron commander, takes the guidon from Col. Michael Mongold, 628th Missions Support Group commander during the squadron's change of command ceremony May 29, 2015 at the Charleston Club on Joint Base Charleston, S.C. Thomas' previous assignment was at Air University, Maxwell Air Force Base, Al., where he was the chief of Protocol. (U.S. Air Force photo/Jessica Donnelly)