U.S. Air Force Col. Steven M. Zubowicz, 52nd Mission Support Group commander, left, gives the ceremonial guidon to Lt. Col. Gregory Mayer, incoming 52nd Civil Engineer Squadron commander, during the 52nd CES change of command ceremony at Spangdahlem Air Base, Germany, July 2, 2018.(U.S. Air Force photo by Airman 1st Class Valerie Seelye)