March 14, 2018 - U.S. Marine Corps officer candidates participate in the Montford Point challenge at the Officer Candidates School, Marine Corps Base Quantico, Virginia. 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 U.S. Marine Corps officer. (Image created by USA Patriotism! from U.S. Marine Corps Photo by Staff Sgt. Melissa Marnell)

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