U.S. Marine Corps Lance Cpl. Pablo Perez, a rifleman with Kilo Company, 3rd Battalion, 4th Marine Regiment, provides security during Counter Improvised Explosive Device (CIED) training at Camp Leatherneck, Helmand Province, Afghanistan, April 3, 2013. The training, taught by 2d Combat Engineer Battalion instructors, covered CIED tactics and techniques in a Military Operations in Urban Terrain environment. (U.S. Marine Corps Photo by Sgt. Tammy K. Hineline)