Lance Cpl. Tyler Brinkman, an entry control point guard and radio operator with Headquarters Battalion, Communications Company, 2nd Marine Division, relays information through a radio as a 7-ton truck carrying Marines travels though the command post exercise ECP at Landing Zone Bluebird on Marine Corps Base Camp Lejeune, N.C., Jan. 28, 2015. ECP guard’s duty is to control movement going in and out of the compound and maintain awareness at all times to keep the compound safe. (U.S. Marine Corps photo taken by Lance Cpl. Alexander Mitchell/released) - Lance Cpl. Tyler Brinkman, an entry control point guard and radio operator with Headquarters Battalion, Communications Company, 2nd Marine Division, relays information through a radio as a 7-ton truck carrying Marines travels though the command post exercise ECP at Landing Zone Bluebird on Marine Corps Base Camp Lejeune, N.C., Jan. 28, 2015. ECP guard’s duty is to control movement going in and out of the compound and maintain awareness at all times to keep the compound safe. (U.S. Marine Corps photo taken by Lance Cpl. Alexander Mitchell/released)