U.S. Air Force Maj. Michael McGrath (right), 39th Force Support Squadron incoming commander, assumes command from Col. Todd Stratton, 39th Mission Support Group commander, July 7, 2017, at Incirlik Air Base, Turkey. A change of command is a tradition that represents the formal transfer of authority and responsibility from the outgoing commander to the incoming commander. (U.S. Air Force photo by Senior Airman Jasmonet D. Jackson)