The back-to-back announcements, which many outside analysts consider threats designed to spur talks with the United States that could eventually provide impoverished North Korea with concessions, will push Pyongyang further toward a standoff with Washington and its allies.
The North said in its state media that its plutonium and highly enriched uranium facilities at the main Nyongbyon nuclear complex had been "rearranged, changed or readjusted and they started normal operation."
Yesterday, Pyongyang warned that it is ready to launch "satellites" aboard long-range rockets that the West considers banned long-range missiles meant to eventually threaten America's mainland with atomic bombs.
The North's National Aerospace Development Administration director said scientists were pushing forward on a final development phase for a new earth observation satellite for weather forecasts.
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"Space development for peaceful purposes is a sovereign state's legitimate right ... And the people of (North Korea) are fully determined to exercise this right no matter what others may say about it," the director told Pyongyang's official Korean Central News Agency. The world will "clearly see a series of satellites soaring into the sky at times and locations determined" by the Workers' Party.
After several failures, it put its first satellite into space with a long-range rocket launched in late 2012. The UN said it was a banned test of ballistic missile technology and imposed sanctions.
Experts say that ballistic missiles and rockets in satellite launches share similar bodies, engines and other technology.
An angry North Korea then conducted its third nuclear test
Washington sees North Korea's pursuit of nuclear weapons and ballistic missiles as a threat to world security and to its Asian allies, Japan and South Korea.