Master Sgt. Michael Raby, 319th Civil Engineer Squadron first sergeant, waits for the signal to start another round during a timed fireman team challenge on Oct. 9, 2014, on Grand Forks Air Force Base, N.D. Fireman challenge incorporated a hose pull, target house, dummy drag and a Kaiser sled. (U.S. Air Force photo/Senior Airman Xavier Navarro)
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