Warm-up lap
U.S. Air Force Staff Sgts. Aaron Williams and Thomas Heinig, 372nd Training Squadron instructors, complete a warm-up lap around the running track at Moody Air Force Base, Ga., Aug. 17, 2011. Williams and Heinig are currently training for the Air Force Marathon scheduled for Sept. 17, 2011, at Wright-Patterson Air Force Base, Ohio. It will be their second AF marathon in a row (U.S. Air Force photo by Staff Sgt. Jamal D. Sutter/Released)