Col. Mark Sigler, 434th Operations Group commander, right, Lt. Col. Erik Aufderheid, 72nd Air Refueling Squadron outgoing commander, center, and Lt. Col. Anne Noel, 72nd ARS incoming commander, stand at attention during the singing of the national anthem during a change of command ceremony at Grissom Air Reserve Base, Ind., June 4, 2016. Change of command ceremonies afford service members the opportunity to witness the symbolic passing of the torch in the presence of friends, family and fellow Airmen. (U.S. Air force photo/Staff Sgt. Katrina Heikkinen)
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