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Airman 1st Class Austin Bristow, a heating, ventilation and air conditioning apprentice with the 319th Civil Engineer Squadron, performs tricep extensions Nov. 2, 2017, in the fitness center on Grand Forks Air Force Base, N.D. Bristow works out multiple times a week in order to maintain and exceed Air Force fitness standards. (U.S. Air Force photo by Airman 1st Class Elora J. Martinez)
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