Scaling the wall
THE WALL U.S. Air Force Servicemembers work the wall challenge course at the Pretty Lake Adventure Center, Kalamazoo, Mich. Aug. 21, 2010. The 110th Airlift Wing service members were participating in the Adventure Centers’ Leadership training course. (U.S. Air Force photo by Tech. Sgt. Sonia Calbaugh/Released)

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Photo by: Tech. Sgt. Sonia CalbaughReleased |  VIRIN: 100821-F-1455C-078.JPG