U.S. Air Force Col. David R. Lopez, left, 1st Fighter Wing commander, receives the 1st Maintenance Group guidon from Col. David Seitz, right, 1st MXG outgoing commander, during the 1st MXG change of command at Joint Base Langley-Eustis, Virginia, May 14, 2021. After three years in command of the MXG, Seitz will retire from active duty. (U.S. Air Force photo by Staff Sgt. Chandler Baker)