Marine Corps Staff Sgt. Timothy J. Kalk, range officer in charge, II Marine Expeditionary Force, gives a safety brief before Naval Reserve Officers Training Corps Midshipman enter the gas chamber during the Career Orientation Training for Midshipmen (CORTRAMID) Marine Week on Marine Corps Base Camp Lejeune, , July 24, 2018. The purpose of CORTRAMID is to expose students to opportunities in the Fleet Marine Forces and generate an interest in a Marine Corps commission.

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Photo credit: © Barney Low / Alamy / Afripics
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