U.S. Marine Corps Staff Sgt. Pedro Guerrero, right, a section leader with the 3rd Assault Amphibian Battalion, briefs members of the Japan Ground Self-Defense Force on safety procedures before a splash demonstration by AAV-7 assault amphibious vehicles Feb. 16, 2014, at Marine Corps Base Camp Pendleton, Calif., during exercise Iron Fist 2014. 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.