U.S. Marine Corps Staff Sgt. Lloyd Crabtree, combat engineer staff noncommissioned officer in charge, assigned to Marine Wing Support Squadron (MWSS) 274, briefs his Marines before conducting a security patrol part of the Air Base Ground Defense (ABGD) Field Exercise held at Marine Corps Auxiliary Landing Field Bogue, N.C., on Feb. 26, 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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