A Navy Lt. clears his M50 Joint Service General Purpose Masks during a gas chamber training exercise at Fort Pickett, Va., Feb. 15, 2016. The training was conducted as part of annual training required for the Marines preparing for an upcoming deployment. ( Marine Corps photo by Lance Cpl. Koby I. Saunders/ 22 Marine Expeditionary Unit/ Released) 22nd MEU Conducts CBRN Gas Chamber Annual Training 160215-M-AF202-113

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Photo credit: © PJF Military Collection / Alamy / Afripics
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