U.S. Marine Corps 1st Lt. Matthew Himes, left, assistant

U.S. Marine Corps 1st Lt. Matthew Himes, left, assistant operations officer for Headquarters Company, Headquarters Battalion, 2nd Marine Division supervises the set up of constantina wire at a camp entrance during the II Marine Expeditionary Force training exercise (MEFEX) on Camp Lejeune, N.C., May 12, 2016. MEFEX is conducted biennially and provides the Marines of II MEF a way to evaluate mission readiness and prepare for future combat operations. (U.S. Marine Corps photo by Lance Cpl. Haidarali Saad, 2D MARDIV COMCAM/Released)