The Aurora Borealis lights are visible over Thule Air Base, Greenland Dec 11, 2017. Thule is the most northern base United States military members are stationed at around the world, and is charged with the mission of missile warning, space surveillance and satellite command and control. ( Air Force photo by Senior Airman Dennis Hoffman)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
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Keywords: afspc, air, crisswell, force, grant, greenland, pepper, radar, raymond, space, thule