Republic of Korea (ROK) Marine Corps Gunnery Sgt. Min Soo Jung, left, a radio chief with the 1st ROK Marine Division, does a radio check with a field radio and the secure communications controller as U.S. Marines with Headquarters Battalion, 3rd Marine Division, III Marine Expeditionary Force look on in the combined operations center during Marine Expeditionary Force Exercise (MEFEX) 2014 at Daegu Air Base, South Korea, March 12, 2014. MEFEX 2014 was a U.S. Marine Corps Forces Pacific-sponsored series of exercises between the U.S. Navy and Marine Corps and South Korean forces. Among the exercises were the Korea Marine Exercise Program, Freedom Banner 14, Ssang Yong 14, Key Resolve 14 and Combined Marine Component Command 14 command post exercise.