Recruits with Delta Company, 1st Recruit Training Battalion, prepare and perform chemical, biological, radiological, and nuclear (CBRN) defense training at Marine Corps Recruit Depot Parris Island, Jan. 30, 2023. This training teaches recruits how to employ the M50 gas mask when CBRN hazards are present.

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Keywords: cbrn, chamber, gas, mcrd, mcrdpi, recruit, recruits, training