U.S. Marine Corps Cpl. Joseph Vickers, a machine gunner

U.S. Marine Corps Cpl. Joseph Vickers, a machine gunner with Weapons Company, 2nd Battalion, 4th Marine Regiment, teaches Singapore guardsmen with Alpha Company, 1st Battalion Singapore Guards how to assemble and disassemble an M240B machine gun during exercise Valiant Mark 14.1 on Bedok Camp II, Singapore, Jan. 16, 2014. Valiant Mark is an annual exercise conducted by U.S. Marines and the Singapore Armed Forces in order to maintain a high level of interoperability, enhanced military to military relations and to enrich mutual combat capabilities through combined training. (U.S. Marine Corps photo by Sgt. Kowshon Ye/Released)