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U.S. Marines and Sailors assigned to the Command Element, 24th Marine Expeditionary Unit conduct annual chemical, biological, radiological and nuclear defense training at Camp Lejeune, N.C., Feb. 27, 2012.

The training taught the Marines and Sailors how to use the new M50 joint service general purpose gas mask. (U.S. Marine Corps photo by Cpl. Michael Petersheim/Released). Original public domain image from Flickr

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U.S. Marines and Sailors assigned to the Command Element, 24th Marine Expeditionary Unit conduct annual chemical, biological, radiological and nuclear defense training at Camp Lejeune, N.C., Feb. 27, 2012.

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