Gym in a Box
Maj. A.J. Stark, Air Force Special Operations Command special operations forces programming chief, worksout at the total-body resistance exercise pad on Hurlburt Field, Fla., July 23, 2014. The TRX pad is a facility designed for full-body workouts with minimal equipment. (U.S. Air Force photo layout/Airman 1st Class Jeff Parkinson)