U.S. Marine Corps 1st Lt. Harry J. D. Walker, left, a Brookline, Mass., native and a platoon commander assigned to Charlie Company, 1st Battalion, 3rd Marine Regiment, communicates with his platoon while taking simulated fire during Korean Marine Exchange Program (KMEP) 17-14 on the North West Islands, Republic of Korea, August 11, 2017. KMEP 17-14 enables the Republic of Korea and U.S. Marines to focus on exchanging tactics, procedures, and increasing interoperability. The Hawaii-based battalion is forward deployed to Japan as part of the Unit Deployment Program. (U.S. Marine Corps photo by Cpl. Aaron S. Patterson)