SEYMOUR JOHNSON AIR FORCE BASE, N.C. —  Col. Tammy McElhaney, left, 4th Mission Support Group commander, passes the guidon to Lt. Col. Hans Winkler, incoming 4th Civil Engineer Squadron commander, as he assumes command of the 4th CES during a change of command ceremony at Seymour Johnson Air Force Base, North Carolina, July 22, 2022. Prior to assuming command of the 4th CES, Winkler was the commander of the 423rd Civil Engineer Squadron at Royal Air Force Air Station in Alconbury, United Kingdom. (U.S. Air Force photo by Senior Airman Kimberly Barrera)