A North Korean soldier guards the banks of Yalu River near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong, December 8, 2009. U.S. President Barack Obama's first envoy to North Korea arrived in Pyongyang on Tuesday to try to coax the prickly state back to the nuclear talks it quit a year ago, but without offering it any new incentives. REUTERS/Jacky Chen (NORTH KOREA POLITICS MILITARY)