U.S. Marines with the 1st Air Naval Gunfire Liaison Company and Japan Ground Self-Defense Force soldiers watch illumination rounds Feb. 13, 2014, during Iron Fist 2014 at San Clemente Island, Calif. Iron Fist is a three-week bilateral training event held annually between the U.S. Marine Corps and the Japan Ground Self-Defense Force designed to increase interoperability between the two services while aiding the Japanese in their continued development of amphibious capabilities.