The decision to abandon the policy of aggressive containment, and launch a war to overthrow Saddam has led us to the precipice of what we had been attempting to avoid for a quarter of a century -- the breakup of Iraq, and dangerous instability for the foreseeable future, including the distinct possibility of a terrorist safe haven in the Sunni tribal lands. And, whether we agree with it or not, the U.S. will forever be blamed for all of the negative consequences. Relitigating the past is obviously painful for those who were so terribly wrong, and whose actions led to what is arguably the most egregious foreign policy error in the history of our country. But it is necessary as we consider the way ahead.