North Korea, according to a report by CNN, has restarted construction on a nuclear reactor that could increase its production of plutonium for nuclear weapons by a factor of ten.
Citing satellite images and a source familiar with U.S. intelligence, CNN reported over the weekend that the reactor in question, at the North's nuclear facility at Yongbyon, is under construction again work having stopped initially in 1994.
Officials, the report said, say the North is not trying to hide the work.
This reactor has a capacity of 50 megawatts, while the other one, active since the 1980s, is 5 megawatts.
A weapons expert, Jeffrey Lewis at the Middlebury Institute, told CNN that the images show the North is working on the reactor's cooling loop, which would explain other activities seen at the site in recent years.