U.S. Marines assigned to bravo battery, 1st Battalion, 12th Marines (1/12), loads and calibrates the coordinates on the M327 120mm Rifle Towed Mortar (RTM) system during evening sustainment training aboard Camp Pohakuloa, Hawaii, Jan. 20th, 2014. Members of bravo battery, 1/12, are enhancing their skills of direct fire support in support of operation Lava Viper. (U.S. Marine Corps photo by Lance Cpl. Aaron S. Patterson/Released)