IRON FIST U.S. Marine Corps Sgt. Ryan Visket gives a class on the M32A1 multi-shot grenade launcher to Japanese soldiers on Camp Pendleton, Calif., Feb. 16, 2011. The troops are participating in Iron Fist, a bilateral training exercise between the U.S. and Japanese militaries to increase interoperability. The Japanese soldiers are assigned to the Western Army Infantry Regiment, part of the Japan Ground Self-Defense Force. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 497677-I-UWE18-333.jpg Photo Gallery