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U.S. Air Force Lt. Col. Marc Kurup, 343rd Bomb Squadron Radar Navigator, watches as safety gear is strapped in place prior to taking part in water survival training at Barksdale Air Force Base, La., July 13, 2013. The refresher course is required every three years for all air crew members. Participants take part in four different stations and are coached on how to get away from a parachute and deploy and use various life-saving devices including rafts and helicopter lifts. ( U.S. Air Force photo by Tech. Sgt. Ted Daigle/Released)