ecretary of Defense Ash Carter, Canadian Minister of National Defense Harjit Sajjan, Chairman of the Joint Chiefs of Staff Marine Gen. Joseph F. Dunford Jr., and Canadian Chief of the Defense Staff Gen. Jonathan Vance listen as Adm. Bill Gortney, outgoing commander, North American Aerospace Defense and commander, Northern Command delivers remarks during the change of command ceremony between himself and Air Force Gen. Lori Robinson at Peterson Air Force Base, Colo., May 13, 2016 . (Photo by Senior Master Sgt. Adrian Cadiz)(Released)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: .., ash, ashcarter, carter, change, command, defense, department, dod, northcom, northern, pentagon, secdef, secretary