Marine Corps Sgt. Lacey Brooke, Sgt. Dary Selgren, and Staff Sgt. Jessica Morillo, drill instructors, with Platoon 4046, O. Co., 4th Battalion, Recruit Training Regiment, instruct a recruit to respond properly near the gas chamber before conducting chemical, biological, radiological, nuclear (CBRN) defense training at Marine Corps Recruit Depot, Parris Island, , Oct. 25, 2016. Training for CBRN defense is an event that recruits must complete in order to become United States Marine.

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Keywords: air, america, archive, armed, army, bucket, chamber, chemicals, defence, force, forces, gas, mcrdpi, military, navy, reportage, service, serviceman, servicemen, soldier, states, united, usa, water