Capt. Yvonne Nollmann, 12th Air Force (Air Forces Southern) section commander, crawls from underneath a tarp during the Hard Charge Televised Obstacle Mission at the Pima County Fairgrounds in Tucson, Ariz., on March 29. Climbing, crawling and sprinting were a few of the many ways the members form 12th Air Force maneuvered though the rigorous four-mile 37-obstacle course. (U.S. Air Force photo by Staff Sgt. Adam Grant/Released)
Staff Sgt. Adam GrantReleased
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