A Marine with Marine Corps Base Butler, 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.

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Keywords: 1st, air, aircraft, archive, armed, base, butler, chamber, corps, defence, forces, futenma, gas, japan, marine, marines, mcipac, military, okinawa, reportage, servicemen, station, usa, wing