U.S. Soldiers check Sgt. Gordon Yeaple, a salvage diver and noncommissioned officer in charge with the 569th Engineer Dive Detachment, during a Salvage Dive Rodeo training at Fort Eustis, Va., March 18, 2016. Yeaple’s simulated taking on bad air during a dive and was rendered unconscious for the purposes of the upgrade task training exercise. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)