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U.S. Air Force Capt., Zachary Walker, U.S. Central Command Forward Headquaters intelligence team officer in charge, performs a front squat during a CrossFit workout session at Al Udeid Air Base, Qatar, May 21, 2014. CrossFit's fitness approach is to improve an athlete's capacity to excel within 10 general physical skills – cardiovascular endurance, stamina, strength, flexibility, power, speed, coordination, agility, balance and accuracy. Walker’s home station is Fort Meade, Maryland, and his hometown is Paris, Texas. (U.S. Air Force photo by Senior Airman Colin Cates)
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