161206-N-WT427-150 YP-DO, Republic of Korea (Dec. 6, 2016) Rear Adm. Brad Cooper, commander, U.S. Naval Forces Korea (CNFK) tours YP-do base during a visit to Yeonpyeong Defense Command. CNFK is the U.S. Navy's representative in the ROK, providing leadership and expertise in naval matters to improve institutional and operational effectiveness between the two navies and to strengthen collective security efforts in Korea and the region. (U.S. Navy photo by Petty Officer 2nd Class Jermaine M. Ralliford)