Marines with Company E, 2nd Battalion, 6th Marine Regiment, 2nd Marine Division provide security from a second-story window during a simulated assault on a combat town aboard Camp Lejeune, N.C., Dec. 4, 2014. While clearing buildings the Marines had to remain conscious of attacks from neighboring buildings and post security to avoid any surprise attacks. (U.S. Marine Corps photo by Lance Cpl. David N. Hersey/Released)