Air Force Gen. Lori J. Robinson delivers remarks after assuming command of North American Aerospace Defense Command and U.S. Northern Command during a change-of-command ceremony at Peterson Air Force Base, Colo., May 13, 2016. Defense Secretary Ash Carter presided as Robinson took command of Northcom and NORAD from Navy Adm. Bill Gortney. DoD photo by Air Force Senior Master Sgt. Adrian Cadiz