S. Korea to send oil to North to close reactor

South Korea prepared Thursday to send to North Korea a shipload of oil that was expected to trigger the communist nation to shut down its only working nuclear reactor in a landmark first step toward dismantling its atomic bomb program. The oil aid is part of economic and political rewards promised to Pyongyang in February in exchange for its agreement to close the Yongbyon nuclear reactor between the United States, China, Japan, the two Koreas and Russia.