Marines with 1st Reconnaissance Battalion, 1st Marine Division, and members of the Japan Ground Self-Defense Force conduct amphibious raids and military operations on urban terrain during Exercise Iron Fist 15 aboard Camp Pendleton on Feb. 3, 2015. Exercise Iron Fist 15 is an annual bilateral training exercise between U.S. and Japanese military forces that builds their combined ability to conduct amphibious and land-based contingency operations. IF15, currently in its tenth iteration, is scheduled from Jan. 26 to Feb. 27, 2015, in southern California. (U.S. Marine Corps photo by Cpl. Angel Serna/Released) - Marines with 1st Reconnaissance Battalion, 1st Marine Division, and members of the Japan Ground Self-Defense Force conduct amphibious raids and military operations on urban terrain during Exercise Iron Fist 15 aboard Camp Pendleton on Feb. 3, 2015. Exercise Iron Fist 15 is an annual bilateral training exercise between U.S. and Japanese military forces that builds their combined ability to conduct amphibious and land-based contingency operations. IF15, currently in its tenth iteration, is scheduled from Jan. 26 to Feb. 27, 2015, in southern California. (U.S. Marine Corps photo by Cpl. Angel Serna/Released)