After our visit to Iraq this month, it is clear that what was once unthinkable there is now taking place: A stable, safe and free Iraq is emerging. Violence has fallen to the lowest level since the first months of the war. The Sunni Arabs who once formed the core of the insurgency are today among our most steadfast allies in the fight against al-Qaeda. A status-of-forces agreement between Iraq and America will take effect next month, providing for the withdrawal of U.S. troops and a commensurate increase in Iraqi self-defense. And Iraqi politics is increasingly taking on the messy but exhilarating quality of a functioning democracy. While uncertainty and risk remain high, and the gains made are not irreversible, the situation in Iraq has improved dramatically since the dark days before the surge.