U.S. Army Spc. Huy Trihn, 155th Inland Cargo Transport Company wheeled vehicle mechanic, swings through the monkey-bar obstacle at the obstacle course on Joint Base Langley-Eustis, Va., September 8, 2016. The monkey bars are the final obstacle on the course, making it a challenge many participants struggle through. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)