The move comes as South Korea and the US begin a large-scale joint military exercise.
As Beijing talks stall, analysts say North Korea may be waiting for a gesture from Barack Obama once he assumes the presidency.
Now there’s a move to keep it that way – and perhaps bring North and South Korea closer together.
It threatened Wednesday to shut its border with South Korea, where activists have been launching giant balloons carrying leaflets.
Missile launches and the expulsion of South Korean personnel from a joint industrial zone show Pyongyang's irritation with Seoul.
U.S. Secretary of State Rice visits Asia to boost the six-party deal, N.Y. Philharmonic plays in Pyongyang.