U.S. Marine Corps photo by GySgt William Greeson/Released 101118-M-0440G-870.jpg
Nov 18, 2010
Staff Sgt. Eric Schleher, 11th Marine Expeditionary Unit, instructs Marines and sailors on how to properly use the new XM-50 field protective mask on Camp Pendleton, Calif., Nov. 18, 2010. DoD photo by Gunnery Sgt. William Greeson, U.S. Marine Corps. (Released)::r::::n::
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