An E-4B from Global Strike Command, Barkesdale Air Force Base, La., sits on the ramp at Travis Air Force Base, Calif., June 9, 2017. The E-4B serves as the National Airborne Operations Center and is a key component of the National Military Command System for the President, the Secretary of Defense and the Joint Chiefs of Staff. (U.S. Air Force photo/Staff Sgt. Nicole Leidholm/Released)
U.S. Air Force photo/Staff Sgt. Nicole Leidholm
2017-06-09
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