Corporal Tanner Pollock, a squad leader with 2nd Combat Engineer Battalion, 2nd Marine Division, and Fort Wayne, Ind. native, holds security while Lance Cpl. Ryan Zerites, a combat engineer with 2nd CEB, and Greensboro, N.C. native, calls in a 9-line medical evacuation request during Military Operations in Urban Terrain, or MOUT, training aboard Camp Lejeune, N.C., April 8, 2015. The training included Marines going out in squad sized elements to attack an objective being held by Marines in the defensive position after the squad leaders built terrain models and informed their Marines on avenues of approach and objectives. (U.S. Marine Corps photo by Cpl. Krista James/Released) - Corporal Tanner Pollock, a squad leader with 2nd Combat Engineer Battalion, 2nd Marine Division, and Fort Wayne, Ind. native, holds security while Lance Cpl. Ryan Zerites, a combat engineer with 2nd CEB, and Greensboro, N.C. native, calls in a 9-line medical evacuation request during Military Operations in Urban Terrain, or MOUT, training aboard Camp Lejeune, N.C., April 8, 2015. The training included Marines going out in squad sized elements to attack an objective being held by Marines in the defensive position after the squad leaders built terrain models and informed their Marines on avenues of approach and objectives. (U.S. Marine Corps photo by Cpl. Krista James/Released)