By a member of the 9/11 Commission and a vocal opponent of the current administration: 

No matter how incompetent the Bush administration and no matter how poorly they chose their words to describe themselves and their political opponents, Iraq was a larger national security risk after Sept. 11 than it was before. And no matter how much we might want to turn the clock back and either avoid the invasion itself or the blunders that followed, we cannot. The war to overthrow Saddam Hussein is over. What remains is a war to overthrow the government of Iraq.

Some who have been critical of this effort from the beginning have consistently based their opposition on their preference for a dictator we can control or contain at a much lower cost. From the start they said the price tag for creating an environment where democracy could take root in Iraq would be high. Those critics can go to sleep at night knowing they were right.

The critics who bother me the most are those who ordinarily would not be on the side of supporting dictatorships, who are arguing today that only military intervention can prevent the genocide of Darfur, or who argued yesterday for military intervention in Bosnia, Somalia and Rwanda to ease the sectarian violence that was tearing those places apart.