As far as weather we should attack Iraq or not, I say we'd better have some good intel before we do, but only to make sure they don't already have nukes with ACBM's already. (China?)
Personally, I'm not in the mood to get nuked!
IOW's, TIME IS OF ESSENCE. Better before than after.
If they are coming for you tomorrow, you must strike today. If they already have a nuke, best strike before they have two.
And remember, it doesn't take a ballistic missile to deliver it. It just takes a cargo ship. Or an airliner. In fact, a ship or a civilian plane is far superior, in that it is very deniable. No one would ever be able to prove who sent it.