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Airman 1st Class Austin Bristow, a heating, ventilation and air conditioning apprentice with the 319th Civil Engineer Squadron, performs a pull-up Nov. 2, 2017, in the fitness center on Grand Forks Air Force Base, N.D. Bristow started his fitness journey two years ago after he realized he was too heavy to enlist. (U.S. Air Force photo by Airman 1st Class Elora J. Martinez)
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