New York Times: According to a recent report by the US–Korea Institute at the Johns Hopkins University’s School of Advanced International Studies, North Korea may have restarted one of its nuclear reactors in order to produce weapons-grade plutonium. Satellite images show steam rising from the Yongbyon nuclear facility, an indication that it is once more up and running. Despite having agreed in 2007 to shut it down, North Korea has since rebuilt parts of the reactor that had been dismantled, evicted inspectors, and conducted several nuclear tests. And earlier this year, it announced it was reopening the plant, ostensibly to generate electricity. US officials are being cautious in their assessment of the current situation because of North Korea’s history of making, then breaking, promises to disarm in order to gain concessions in the form of economic aid and fuel.