The 2,000 working centrifuges for processing uranium adaptable to the fueling of nuclear weapons, which North Korea showed off to visiting US scientist Prof. Siegried Hecker of Stanford University on Nov. 12, told US and Western intelligence that Pyongyang was shifting its weapons program to enriched uranium.
The plutonium facilities which yielded North Korea’s estimated arsenal of 8-12 nuclear weapons were judged by the visiting American scientist to be dormant.