U.S. Marine Corps photo by Pfc. Michael T. Gams/Released 090922-M-0000P-002.jpg
Sep 22, 2009
Sgt. Robert Jackson, the chemical, biological, radiological and nuclear chief with 1st Tank battalion, fills Combat Center Range 105's gas chamber with o-Chlorobenzylidene Malononitrile, more commonly known as CS gas, Sept. 22 as Marines and sailors from Headquarters Battalion stand in full protective gear while they complete their annual gas chamber training.
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