A British Royal Marine demonstrates proper technique for rope sliding during an Officer Candidate School (OCS) obstacle course at OCS, Marine Corps Base Quantico, Va., June 2, 2017. Candidates must go through three months of intensive training to evaluate and screen individuals for the leadership, moral, mental, and physical qualities required for commissioning as a Marine Corps officer. ( Marine Corps photo by Lance Cpl. Cristian L. Ricardo)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: comcam, comcamfeature, corps, marine, mcb, obstacle, ocs, quantico