U.S. Marine Corps photo by Lance Cpl. Preston McDonald/Released 160108-M-OD000-096.JPG
Jan 12, 2016
Lance Cpl. Jamie Roper, a chemical, biological, radiological, and nuclear Marine with Headquarters Company, 2nd Marine Logistics Group, disperses chlorobenzylidene malononitrile, or CS gas, in preparation for gas chamber bi-annual qualification at Camp Lejeune, N.C., Jan.8. The chamber is a routine exercise to ensure the durability of each Marine's gear while exposed to CS gas. (U.S. Marine Corps photo illustration by Lance Cpl. Preston McDonald/Released)
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