MOODY AIR FORCE, Ga. -- U.S. Air Force Col. Nathan Hier (right), incoming commander of the 23d Maintenance Group, receives the guidon from Col. Sean Hall (left), 23d Wing commander, during a change of command ceremony at Moody Air Force Base, Georgia, March 23, 2026. Hier previously served as the 15th Air Force A4 Director at Shaw Air Force Base, South Carolina. (U.S. Air Force photo by Airman 1st Class Rachel Howell)