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Airman 1st Class Austin Bristow, a heating, ventilation and air conditioning apprentice with the 319th Civil Engineer Squadron, performs shoulder flys Nov. 2, 2017, in the fitness center on Grand Forks Air Force Base, N.D. Bristow schedules his workouts in a manner that allow him to alternate between exercising his upper and lower body. (U.S. Air Force photo by Airman 1st Class Elora J. Martinez)
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