Maj. Gen. Scott J. Zobrist, the 9th Air Force commander; Col. Jennifer Short, the 23rd Wing commander; and Col. Thomas Kunkel, the outgoing 23rd Wing commander, prepare for a change of command ceremony, July 10, 2017, at Moody Air Force Base, Ga. The change of command ceremony is a part of military history signifying the hand-off of responsibility of a unit from one commander to another. (U.S. Air Force photo/ Staff Sgt. Ryan Callaghan)