Marine Corps recruits with Lima Company, 3rd Recruit Training Battalion, prepare to 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