Navy Adm. Bill Gortney delivers remarks during a change-of-command ceremony for the North American Aerospace Defense Command and U.S. Northern Command at Peterson Air Force Base, Colo., May 13, 2016. Gortney relinquished command of NORAD and Northcom to Air Force Gen. Lori J. Robinson during the ceremony. DoD photo by Navy Petty Officer 2nd Class Dominique A. Pineiro