U.S. Marine Corps Cpl. Eric K. Scheftgen, chemical biological radiological nuclear defense specialist, assigned to Marine Wing Support Squadron (MWSS) 274, delivers a class covering the fundamentals of the M50 joint service multipurpose mask during an Air Base Ground Defense (ABGD) Field Exercise held at Marine Corps Auxiliary Landing Field Bogue, N.C., on March 1, 2015. MWSS-274 conducted the squadron level training in order to exercise core mission tasks and refine ABGD Standard Operating Procedures. (U.S. Marine Corps photo by Sgt. Orlando Perez/Released)
Sgt. Orlando Perez
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