We're going to destroy Hussein, ostensibly because he might kill hundreds of thousands of people...yet we don't even raise an eyebrow when that happens in actual fact somewhere else. And many here still maintain there is nothing wrong with US foreign policy? I don't know, maybe its because Sadaam's potential victims could be US citizens (you know - you, me, your mother/wife/daughter). Therefore, the US is going to act pre-emptively.
Other folks, better than I, have made the case. If anyone launched the couple of ICBMs they might have, we would know instantly, and that country would be a smoking hole. If bio-agents were released, or a dirty-bomb smuggled in and set off, once we knew where it came from, and who was involved, we would similarly retaliate. There is no one on the planet that can do more than kill a few million in the US, at most...while they would be certain of their own destruction.
You can not make the world 'safe' from violence by initiating violence - ever...it is a logical contradiction; and I, for one, am not willing that the country I call my home have leaders stupid enough to try.