Colin Powell sics US on Iran

The LA Times reports that he announced that Iran has missiles capable of carrying nuclear weapons, apparently on the basis of one disgruntled Iranian exile's statements (shades of Chalabi). As Marc Cooper asks, how can anyone make a reasonable decision about this "intelligence" after he did the exact same thing with Iraq and turned out to be, not only wrong, but lying through his teeth? I'm starting to think that the Bush administration never read the fable about the boy who cried wolf.