Marine Corps recruits with Lima Company, 3rd Recruit Training Battalion, exit the confidence chamber on Marine Corps Base Camp Pendleton, California, May 17, 2022. The chamber is filled with chlorobenzalmalononitrile, a form of tear gas, to instill confidence in recruits’ skills and their gear in the event of a chemical, biological, radiological, or nuclear attack.

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Photo credit: © Operation 2022 / Alamy / Afripics
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Keywords: marines, mcrdsd, recruit, recruits, training, usmc