Why Making North Korea Nuclear-Free Will Be So Hard

In the history of nuclear weapons there has been only one country that voluntarily gave up its weapons and the program that produced them, and that is South Africa.

.. The South African program was unusual in several ways. It used a method of enriching uranium that had never been tried on an industrial scale, injecting hexafluoride gas at very high velocity into a tube to separate out the fissile bomb-making isotope, uranium 235.

.. South Africa had managed to manufacture six bombs and had one under construction when, in 1989

.. Libya is often cited as having given up its nuclear program. But it was an entirely different case.

.. Colonel Qaddafi bought a very expensive package of material from the Pakistani nuclear physicist Abdul Qadeer Khan, who ran an illicit nuclear proliferation network.