Republic of Korea Marines fire rounds from a Daewoo K201 40mm grenade launcher Feb. 5 at a mountainside during Korean Marine Exchange Program 15-3 at Gimpo, Republic of Korea. After this demonstration, the ROK Marines began to teach U.S. Marines the different characteristics of the weapon and how to properly use it. The U.S. Marines are reconnaissance men with Alpha Company, 3rd Reconnaissance Battalion, 3rd Marine Division, III Marine Expeditionary Force. The ROK Marines are with 2nd Battalion, 2nd Marine Division. (U.S. Marine Corps photo by Cpl. Tyler S. Giguere/Released)