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Cheyenne Mountain Hosts 5K Tunnel Run and Open House
Runners race up the mountain at the Cheyenne Mountain Air Force Station 5k Tunnel Run/Open House at Cheyenne Mountain Air Force Station, Colo., on May 26, 2016. Participants had the opportunity to pause along the route, to experience the blast doors and information and historical booths. (U.S. Air Force photo by Airman 1st Class Dennis Hoffman)

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Photo by: A1C Dennis Hoffman |  VIRIN: 160526-F-SV792-078.JPG

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