Hecker visited the Yongbyon nuclear plant in 2010 . The scientists estimates North Korea has as many as 8 plutonium bombs . Pyongyang recently agreed to allow inspectors back in in exchange for food aid . The Stanford University scientist visited Yongbyon in November , 2010 , and reported that he saw a facility that housed 2,000 centrifuges and was producing low-enriched uranium . Comment:
Hecker visited the Yongbyon nuclear plant in 2010 . The scientists estimates North Korea has as many as 8 plutonium bombs . Pyongyang recently agreed to allow inspectors back in in exchange for food aid . Comment: