Dr. Khan's confession suits both Pakistan and America, since rounding up Al Qaeda and Taliban leaders (many may be hiding in Pakistan) trumps other concerns. But it is widely believed in Pakistan and elsewhere that the government knew of Dr. Khan's activities. This would make President Musharraf, as well as army and intelligence services, complicit in the nuclear crime of the century.

As improbable as it may seem, though, President Musharraf may, for once, be telling the truth. But the fact that this rogue operation could have been mostly unknown to the Islamabad government and its army should trouble the world even more -- and propel Washington into rethinking its policies toward Pakistan.

So far, Washington has stood by General Musharraf, who is considered a crucial ally in the campaign against terrorism. In doing so, it has placed its bets on a man who is, at best, well intentioned, but who may be in over his head.