This undated photo released by the South Korea Navy on Tuesday, Nov. 10, 2009 shows South Korean Navy patrol boats, the same type of South Korean boats that involved in a naval clash with a North Korean ship, engage in an exercise in the West Sea, South Korea. The two Koreas briefly exchanged naval fire Tuesday along their disputed western sea border, with a North Korean ship suffering heavy damage before retreating, South Korean military officials said.
(AP Photo/ South Korea Navy via Yonhap)