Republic of Korea (ROK) Marines learn how to enter and clear rooms with U.S. Marines during training at the Boondocker Training Area aboard Marine Corps Base (MCB) Hawaii, May 27th, 2014. The ROK Marines participated in operation Island Viper with U.S. Marines conducting Amphibious, Offensive, and Stability Operations to develop small unit level leadership and increased their lethality and ability to fight prior to large scale operations such as the Rim of the Pacific Exercise (RIMPAC). (U.S Marine Corps photo by Lance Cpl. Aaron S. Patterson, MCBH Combat Camera/Released)