U.S. Marine Corps Cpl. Tristan Walker, a helicopter crew chief with Marine Light Attack Helicopter Squadron (HMLA) 267, Marine Aircraft Group 36, 1st Marine Aircraft Wing, sights in on an M2 machine gun during a simulated close air support (SIMCAS) exercise during Korean Marine Exchange Program 25.1, in South Korea, March 11, 2025. SIMCAS are training exercises to provide ground combat with aerial support. KMEP is a semi-annual exercise that provides iterative opportunities for Republic of Korea Marine Corps and U.S. Marine Corps units to train together, improving their combined capabilities to deter threats and maintain peace on the Korean Peninsula. (U.S. Marine Corps photo by Lance Cpl. Yanisa Culp) - U.S. Marine Corps Cpl. Tristan Walker, a helicopter crew chief with Marine Light Attack Helicopter Squadron (HMLA) 267, Marine Aircraft Group 36, 1st Marine Aircraft Wing, sights in on an M2 machine gun during a simulated close air support (SIMCAS) exercise during Korean Marine Exchange Program 25.1, in South Korea, March 11, 2025. SIMCAS are training exercises to provide ground combat with aerial support. KMEP is a semi-annual exercise that provides iterative opportunities for Republic of Korea Marine Corps and U.S. Marine Corps units to train together, improving their combined capabilities to deter threats and maintain peace on the Korean Peninsula. (U.S. Marine Corps photo by Lance Cpl. Yanisa Culp)