A North Korean soldier (left) and a South Korean soldier stand opposite each other at the demilitarized zone separating the two Koreas. Yonhap/AFP/Getty Images hide caption

itoggle caption Yonhap/AFP/Getty Images

A South Korean protester burns a North Korean flag with an image of North Korean leader Kim Jong Il during a rally in Seoul on Tuesday. South Korea has imposed trade sanctions on the North for alleged sinking a southern naval vessel. Jung Yeon-je/AFP/Getty Images hide caption

itoggle caption Jung Yeon-je/AFP/Getty Images

South Korean President Lee Myung-bak speaks during a press conference Monday at a war memorial in Seoul. Lee announced plans to take North Korea to the U.N. Security Council and suspended most trade between the two Koreas. Presidential House via Getty Images hide caption

itoggle caption Presidential House via Getty Images