Gunnery Sergeant Liegh Bibona, a Sergeant Instuctor with Charlie Company, corects a candidate during close-order drill practice at Officer Candidate School, Marine Corps Base Quantico, Virginia on Oct. 21, 2016. Close-order drill is one of the key elements to teaching candidates teamwork and discipline. (Official Marine Corps photo by Sgt. John A. Martinez Jr.)

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Keywords: base, candidate, candidates, close-order, command, corps, drill, female, instructor, marine, mcrc, ocs, officer, quantico, recruiting, school, usmc