Late 1980s: A. Q. Khan Supplies North Korea with Basic Technology for Nuclear Program

Pakistani nuclear scientist A. Q. Khan supplies North Korea with some basic technology for its nuclear program. The equipment is to be used for enriching uranium, but the Koreans are unable to make full use of the technology as they do not have the technical expertise to master the process alone. This causes co-operation between Pakistan and North Korea on nuclear matters to stall, until it is revived some years later (see Late 1990 or After). [Levy and Scott-Clark, 2007, pp. 220]