Korean Peninsula The USS Chief travels through waters near the Korean Peninsula during the Multinational Mine Warfare Exercise near Busan, South Korea, Oct. 19, 2017. The annual exercise focuses on mine countermeasures to increase combined capabilities and readiness to respond to any contingency on the peninsula. Navy photo by Seaman William Carlisle SHARE: Download: Full Size (0.88 MB) Credit: Seaman William Carlisle VIRIN: 171019-N-TB148-545C.JPG Photo Gallery