Soldiers with the Western Army Infantry Regiment, Japan Ground Self Defense Force secure a rope shortly after jumping out the back of an MV-22 Osprey tilt-rotor aircraft during Exercise Iron Fist 2018 on Marine Corps Base Camp Pendleton, Calif, Jan. 23, 2018. Iron Fist is an annual, bilateral training exercise where U.S. and Japanese service members train together and share techniques, tactics and procedures to improve their combined operational capabilities. Marine Corps photo by Gunnery Sgt. Robert B. Brown Jr.