Zombies! Run!
Runners enter the south portal of Cheyenne Mountain Air Force Station, Colorado, during the Zombie Tunnel 5k Fun Run, Oct. 20, 2017. The run gave Front Range military members and their families an opportunity to have an inside look at Cheyenne Mountain AFS. (U.S. Air Force photo by Steve Kotecki)

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Photo by: Steve Kotecki |  VIRIN: 171020-F-JL266-1147.JPG