We are not aware of any flow of illicit nuclear material. North Korea's graphite-moderated reactor at Yongbyon has been fuelled using indigenously produced natural uranium fuel.
Pakistani scientist Dr. A. Q. Khan has admitted to having supplied uranium enrichment technology to North Korea, although North Korea denies having a uranium enrichment programme.
North Korea's willingness to supply to others ballistic missile systems and technology is well established. Given the complexity of ballistic missiles and the necessary support systems, we believe it is extremely unlikely any non-state actor would seek to procure them.
While North Korea might be willing in principle to supply nuclear weapons material and technology to others, we do not currently assess this to be a significant risk. We and our allies, however, are monitoring continuously for any indication North Korea might be considering such a transfer.