U.S. Marine Corps photo by Laurie Pearson/Released 130504-M-DU308-001.JPG
May 20, 2015
Sgt. Moses Machuca, a substance abuse control officer aboard Marine Corps Logistics Base Barstow, Calif., yells "CrossFit" at the top of the rope obstacle during a competition on the obstacle course on MCLB Barstow, Oct. 10. The O-Course allows Marines to maintain combat readiness and fitness standards.
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