When we met last year, our troop levels in Iraq were on the rise. Today, because of the progress just described, we are implementing a policy of "return on success," and the surge forces we sent to Iraq are beginning to come home.

This progress is a credit to the valor of our troops and the brilliance of their commanders. This evening, I want to speak directly to our men and women on the front lines. Soldiers and sailors, airmen, Marines, and Coast Guardsmen: In the past year, you have done everything we've asked of you, and more. Our nation is grateful for your courage. We are proud of your accomplishments. And tonight in this hallowed chamber, with the American people as our witness, we make you a solemn pledge: In the fight ahead, you will have all you need to protect our nation. (Applause.) And I ask Congress to meet its responsibilities to these brave men and women by fully funding our troops. (Applause.)

Our enemies in Iraq have been hit hard. They are not yet defeated, and we can still expect tough fighting ahead. Our objective in the coming year is to sustain and build on the gains we made in 2007, while transitioning to the next phase of our strategy. American troops are shifting from leading operations, to partnering with Iraqi forces, and, eventually, to a protective overwatch mission. As part of this transition, one Army brigade combat team and one Marine Expeditionary Unit have already come home and will not be replaced. In the coming months, four additional brigades and two Marine battalions will follow suit. Taken together, this means more than 20,000 of our troops are coming home. (Applause.)

Any further drawdown of U.S. troops will be based on conditions in Iraq and the recommendations of our commanders. General Petraeus has warned that too fast a drawdown could result in the "disintegration of the Iraqi security forces, al Qaeda-Iraq regaining lost ground, [and] a marked increase in violence." Members of Congress: Having come so far and achieved so much, we must not allow this to happen. (Applause.)

In the coming year, we will work with Iraqi leaders as they build on the progress they're making toward political reconciliation. At the local level, Sunnis, Shia, and Kurds are beginning to come together to reclaim their communities and rebuild their lives. Progress in the provinces must be matched by progress in Baghdad. (Applause.) We're seeing some encouraging signs. The national government is sharing oil revenues with the provinces. The parliament recently passed both a pension law and de-Baathification reform. They're now debating a provincial powers law. The Iraqis still have a distance to travel. But after decades of dictatorship and the pain of sectarian violence, reconciliation is taking place -- and the Iraqi people are taking control of their future. (Applause.)

The mission in Iraq has been difficult and trying for our nation. But it is in the vital interest of the United States that we succeed. A free Iraq will deny al Qaeda a safe haven. A free Iraq will show millions across the Middle East that a future of liberty is possible. A free Iraq will be a friend of America, a partner in fighting terror, and a source of stability in a dangerous part of the world.

By contrast, a failed Iraq would embolden the extremists, strengthen Iran, and give terrorists a base from which to launch new attacks on our friends, our allies, and our homeland. The enemy has made its intentions clear. At a time when the momentum seemed to favor them, al Qaida's top commander in Iraq declared that they will not rest until they have attacked us here in Washington. My fellow Americans: We will not rest either. We will not rest until this enemy has been defeated. (Applause.) We must do the difficult work today, so that years from now people will look back and say that this generation rose to the moment, prevailed in a tough fight, and left behind a more hopeful region and a safer America. (Applause.)

We're also standing against the forces of extremism in the Holy Land, where we have new cause for hope. Palestinians have elected a president who recognizes that confronting terror is essential to achieving a state where his people can live in dignity and at peace with Israel. Israelis have leaders who recognize that a peaceful, democratic Palestinian state will be a source of lasting security. This month in Ramallah and Jerusalem, I assured leaders from both sides that America will do, and I will do, everything we can to help them achieve a peace agreement that defines a Palestinian state by the end of this year. The time has come for a Holy Land where a democratic Israel and a democratic Palestine live side-by-side in peace. (Applause.)

We're also standing against the forces of extremism embodied by the regime in Tehran. Iran's rulers oppress a good and talented people. And wherever freedom advances in the Middle East, it seems the Iranian regime is there to oppose it. Iran is funding and training militia groups in Iraq, supporting Hezbollah terrorists in Lebanon, and backing Hamas' efforts to undermine peace in the Holy Land. Tehran is also developing ballistic missiles of increasing range, and continues to develop its capability to enrich uranium, which could be used to create a nuclear weapon.

Our message to the people of Iran is clear: We have no quarrel with you. We respect your traditions and your history. We look forward to the day when you have your freedom. Our message to the leaders of Iran is also clear: Verifiably suspend your nuclear enrichment, so negotiations can begin. And to rejoin the community of nations, come clean about your nuclear intentions and past actions, stop your oppression at home, cease your support for terror abroad. But above all, know this: America will confront those who threaten our troops. We will stand by our allies, and we will defend our vital interests in the Persian Gulf. (Applause.)