Maj. Shelly A. Martin, 911th Maintenance Squadron commander, receives the squadron guidon from Lt. Col. Katrine Waterman, 911th Maintenance Group commander, during an assumption of command ceremony at the Pittsburgh International Airport Air Reserve Station, Feb. 8, 2020. Assumption of command ceremonies all Airmen to witness the formal shift of authority from one officer to the next. (U.S. Air Force photo by Staff Sgt. Beth Kobily)