Mar 12, 2014

U.S. Marine Corps Sgt. Kenton Ciesla, 26th Marine Expeditionary Unit (MEU) cyber network chief, dons his gas mask during the 26th MEU's chemical biological radiological and nuclear (CBRN) defense training aboard Camp Lejeune, N.C., March 11, 2014. The training consisted of classroom instruction and an obstacle course to familiarize Marines with CBRN defense equipment and procedures. (U.S. Marine Corps photo by Lance Cpl. Joshua W. Brown/Released)

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