Satellite imagery indicates activity at a North Korean laboratory that could separate plutonium for nuclear weapons, a U.S. website that monitors sensitive sites in the isolated country said Monday.
The website, 38 North, said that during the past five weeks, exhaust plumes have been seen two or three times at the radiochemical laboratory complex at Nyongbyon, which is North Korea’s known nuclear facility.
That suggests buildings there are being heated, but it’s unclear for what activity.
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