North Korea has ability to produce at least 10 nuclear weapons...

A South Korean nuclear expert says North Korea is estimated to have enough plutonium and highly enriched uranium to produce at least ten nuclear weapons. The expert, who requested anonymity, said Wednesday that the North is assessed to have more than 40 kilograms of plutonium. He said the plutonium has been acquired through at least three reprocessing efforts since 2003. Given that it takes around six kilograms of plutonium to produce one nuclear weapon, the North currently has the ability to produce six to seven nuclear arms. The expert also said the North is regarded to have 60 kilograms of highly enriched uranium, which is enough to produce three to four nuclear weapons.
(KBS World Radio, 2012-05-03)