South Korean sailors in a speed boat patrol near the country's Yeonpyong Island after finishing military exercises near the disputed sea border with North Korea on Monday, Feb. 20, 2012. (AP Photo/Yonhap, Bae Jung-hyun)

Photo by: Bae Jung-hyun

South Korean sailors in a speed boat patrol near the country's Yeonpyong Island after finishing military exercises near the disputed sea border with North Korea on Monday, Feb. 20, 2012. (AP Photo/Yonhap, Bae Jung-hyun)