Senior Airman John Barron, 99th Civil Engineer Squadron fire protection journeymen, runs on the treadmill in the gym at Fire Station 1 at Nellis Air Force Base, Nev., Feb. 2, 2015. Fire fighters are required to adhere to a higher standard of physical fitness to be proficient in their duties. (U.S. Air Force photo by Staff Sgt. Victoria Sneed)
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