At the same time, Iran is finding an ally in the International Atomic Energy Agency. Its director-general, Mohamed ElBaradei, is a Nobel peace-prize winner who is crusading to confound those he calls “the crazies” in Washington by helping Iran to set its nuclear house in order, receive a clean bill of health and so avert the possibility of another disastrous war...

Yet Iran’s argument is a travesty. Although the National Intelligence Estimate does say that Iran probably stopped work on a nuclear warhead in 2003, it also says that Iran was indeed doing such work until then, and nobody knows how far it got. The UN sanctions are anyway aimed not at any warhead Iran may or may not be building in secret, but at what it is doing in full daylight, in defiance of UN resolutions, to enrich uranium and produce plutonium. We need this for electricity, says Iran. But it could fuel a bomb. And once a country can produce such fuel, putting it in a warhead is relatively easy.

Excerpted from a leader in the February 2 issue of ‘The Economist’