Saddam can still inspire/pay for/incite/recommend terrorist actions against the US. (There are rumors now that he wanted to remote control his fighter jets, turning them into poor man versions of cruise missiles.)

(I'm not claiming that war is justified, but rather there is - abeit a small - aspect of danger to the US.)

My real issue isn't going to war - as much as it is the way we go to war. (I still think we're going about it the wrong way.)