Cpl. Jacob Lebo, a rifleman with 1st Platoon, Bravo Company, 2nd Law Enforcement Battalion, mans the main security post built using over 600 sandbags with his .50 caliber machine gun during the II Marine Expeditionary Force Command Post Exercise 3 at Marine Corps Base Camp Lejeune, North Carolina, April 20, 2016. During the CPX, 2nd LEB posted security around the campsite and defend it from mock enemies, ensuring the headquarters element could complete the mission safely. - Cpl. Jacob Lebo, a rifleman with 1st Platoon, Bravo Company, 2nd Law Enforcement Battalion, mans the main security post built using over 600 sandbags with his .50 caliber machine gun during the II Marine Expeditionary Force Command Post Exercise 3 at Marine Corps Base Camp Lejeune, North Carolina, April 20, 2016. During the CPX, 2nd LEB posted security around the campsite and defend it from mock enemies, ensuring the headquarters element could complete the mission safely.