US warns N Korea over nuclear move.

The US has urged North Korea to reconsider its decision to bar UN monitors from its main nuclear complex.
Secretary of State Condoleezza Rice said restarting its nuclear programme would deepen Pyongyang's isolation, but she added that talks were not dead.
The UN's atomic watchdog earlier said it had removed seals and surveillance cameras from part of the Yongbyon plant at North Korea's request.
The move comes amid a dispute over an international disarmament-for-aid deal.
A similar step in 2002 sparked a crisis which eventually resulted in Pyongyang testing a nuclear weapon in 2006.
The UN nuclear inspectors have been expelled from the most sensitive part of the Yongbyon facility; the reprocessing plant which can be used to make weapons-grade plutonium.More