A Marine with Personnel Support Detachment 18, Marine Air Control Group 18, 1st Marine Aircraft Wing, participated in a Chemical, Biological, Radiological, Nuclear (CBRN) defense training at Marine Corps Air Station Futenma, Okinawa, Japan, Feb. 2. 2017. The gas chamber is a routine exercise to ensure the durability of each Marines gear while exposed to chlorobenzylidene malononitrile, or CS gas, which is a bi-annual qualification requirement for Marines. ( Marine Corps photo by MCIPAC Combat Camera Lance Cpl. Brooke A. Deiters)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: .., 1st, air, aircraft, base, butler, chamber, corps, futenma, gas, japan, marine, marines, mcipac, okinawa, station, wing