Why am I supposed to worry that Iran, some day in the far future, might build a nuclear weapon when Pakistan, with a ready inventory of at least 30 and perhaps as many as 80 nuclear weapons, has fallen into chaos?
The last desperate act of a dictator who feels he is about to be overthrown is to lash out at his own people. Pakistan dictator, Pervez Musharraf, has suspended the constitution (Why do I get the feeling Bush and Cheney masturbate nightly to that phrase?). The Supreme Court justices have been arrested. Scores of opposition leaders and legislators have been rounded up. Soldiers have captured broadcast stations, taking them off the air. The army is patrolling the streets of the cities with the goal of terrorizing the citizenry into acquiesce.
This chaos is manna for Bin Laden and al-Qaeda, it is something they can exploit.