U.S. Air Force Staff Sgt. Daniel Simonsen, 39th Airlift Squadron loadmaster, tightens a bolt to a pulley system that is connected from a parachute to a heavy equipment platform, June 30, 2015, at Dyess Air Force Base, Texas. Simonsen took part in contingency training to practice airdrops to keep loadmasters and pilots mission-ready. (U.S. Air Force photo by Airman 1st Class Austin Mayfield/Released)