U.S. Air Force Tech. Sgt. David Noriega, 7th Operations Support Squadron Survival Evasion Resistance Escape specialist, conducts a water survival course training March 10, 2016, in Abilene, Texas. This course serves as refresher training for aircrew, simulating a situation in which they have been ejected from an aircraft and landed in open water. (U.S. Air Force photo by Airman 1st Class Katherine Miller/Released)