This is gonna sound kinda coarse, but...

We have the strongest military force in the world, not to mention the most advanced. Might makes Right, no matter how wrong that seems/is. We can do it, so we did. Regardless of the legality of the attack. Personally, Iraq was and has been a threat for years, and still is in may a sense. It had to be done eventaully. Why not sooner, rather than later?

/rant