I dont want to get into any argument about the pros and cons of the invasion; but since no one has brought it up; I am going to ask the question; was it all worth it in the end?
Certainly the Iraqis are better off without a tyrant; if you dont count the turmoil and bloodshed of the past decade too high a price. The region is better off without an aggressor who invaded other nations.
But the price of all this has been extremely high for both Americans and Iraqis, the expense of the war and the thousands of deaths. The WMD were at the very least not as serious a threat as was made out to be before the war. Saddam was effectively contained; and while a ruthless dictator was probably less dangerous than Kim Jong Yil of North Korea or even Ahmadinejad's Iran; and the world has endured both the past decade.
It is quite possible that by now he might have met the same fate as Gaddafi; or be clinging for survival like Assad.