U.S. Air Force Col. Christopher Estridge, 39th Medical Group commander, renders his first salute as commander to 39th MDG Airmen at Incirlik Air Base, Turkey, May 18, 2018. A change of command ceremony is a tradition that represents a formal transfer of authority and responsibility from the outgoing commander to the incoming commander. (U.S. Air Force photo by Staff Sgt. Jason Huddleston)