North Korea increased pressure on the U.S. to conclude a deal on dismantling the country’s plutonium program and announced plans to restart a nuclear complex.

Inspectors are investigating whether a Russian scientist helped Iran conduct experiments on how to detonate a nuclear weapon, according to European and U.S. officials.

Inspectors are investigating whether a Russian scientist helped Iran conduct experiments on how to detonate a nuclear weapon, according to European and U.s. officials.

North Korean leader Kim Jong-il recently made his first public appearance in more than a month, the North’s state-run news agency reported.

North Korean leader Kim Jong-il recently made his first public appearance in more than a month, the North’s state-run news agency reported.

The top envoy for North Korea declined to indicate whether he had made progress in efforts to stop the North from reactivating its nuclear weapons program.

The top envoy for North Korea declined to indicate whether he had made progress in efforts to stop the North from reactivating its nuclear weapons program.

The top envoy for North Korea declined to indicate whether he had made progress in efforts to stop the North from reactivating its nuclear weapons program.

The chief American negotiator for North Korea extended his talks in Pyongyang on Thursday in an effort to salvage a crumbling nuclear disarmament deal.

The chief American negotiator for North Korea extended his talks in Pyongyang on Thursday in an effort to salvage a crumbling nuclear disarmament deal.