U.S. Air Force Tech. Sgt. Daniel Day, 633rd Security Forces Squadron flight chief, recovers after completing a water confidence training evolution at Joint Base Langley-Eustis, Va., April 28, 2017. Day and his fellow 633rd SFS Emergency Services Team tested a qualification course which will be used for future candidates who want to join the EST. (U.S. Air Force photo by Senior Airman Derek Seifert)
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