Demonslayer's response is an excellent example of the kind of prideful thinking that will keep U.S. troops in the thick of it in Iraq for years to come.
It's not a fear of losing the "war" that keeps the U.S. involved, its a fear of losing face - a reluctance to do anything that could be construed as a "retreat".
In my opinion, the U.S.-Iraq War has been won. We deposed Saddam, we worked with the Iraqi's to help them develop a constitution, we helped them hold elections to create a democratic government. The current fighting is a combination of religious-sectarian civil war against Iraq's government and resistance against our occupation.
When Pearl Harbor was attacked, we responded by going to war against Japan. Attacking Iraq as a response to 9/11 makes as much sense as attacking Mexico would have after the attack on Pearl.
Its a worse than a shame we still don't even inspect the majority of packages arriving at our ports, and I don't think most ports have the equipment yet to detect a smuggled nuclear weapon. You'd think that would've been one of the first steps taken, yet still it has not been accomplished.