Now, throughout this period, our troop levels in Afghanistan remained a fraction of what they were in Iraq. When I took office, we had just over 32,000 Americans serving in Afghanistan, compared to 160,000 in Iraq at the peak of the war. Commanders in Afghanistan repeatedly asked for support to deal with the reemergence of the Taliban, but these reinforcements did not arrive. And that's why, shortly after taking office, I approved a longstanding request for more troops. After consultations with our allies, I then announced a strategy recognizing the fundamental connection between our war effort in Afghanistan and the extremist safe havens in Pakistan. I set a goal that was narrowly defined as disrupting, dismantling, and defeating al Qaeda and its extremist allies, and pledged to better coordinate our military and civilian efforts.

Since then, we've made progress on some important objectives. High-ranking al Qaeda and Taliban leaders have been killed, and we've stepped up the pressure on al Qaeda worldwide. In Pakistan, that nation's army has gone on its largest offensive in years. In Afghanistan, we and our allies prevented the Taliban from stopping a presidential election, and -- although it was marred by fraud -- that election produced a government that is consistent with Afghanistan's laws and constitution.

Yet huge challenges remain. Afghanistan is not lost, but for several years it has moved backwards. There's no imminent threat of the government being overthrown, but the Taliban has gained momentum. Al Qaeda has not reemerged in Afghanistan in the same numbers as before 9/11, but they retain their safe havens along the border. And our forces lack the full support they need to effectively train and partner with Afghan security forces and better secure the population. Our new commander in Afghanistan -- General McChrystal -- has reported that the security situation is more serious than he anticipated. In short: The status quo is not sustainable.

As cadets, you volunteered for service during this time of danger. Some of you fought in Afghanistan. Some of you will deploy there. As your Commander-in-Chief, I owe you a mission that is clearly defined, and worthy of your service. And that's why, after the Afghan voting was completed, I insisted on a thorough review of our strategy. Now, let me be clear: There has never been an option before me that called for troop deployments before 2010, so there has been no delay or denial of resources necessary for the conduct of the war during this review period. Instead, the review has allowed me to ask the hard questions, and to explore all the different options, along with my national security team, our military and civilian leadership in Afghanistan, and our key partners. And given the stakes involved, I owed the American people -- and our troops -- no less.

This review is now complete. And as Commander-in-Chief, I have determined that it is in our vital national interest to send an additional 30,000 U.S. troops to Afghanistan. After 18 months, our troops will begin to come home. These are the resources that we need to seize the initiative, while building the Afghan capacity that can allow for a responsible transition of our forces out of Afghanistan.

I do not make this decision lightly. I opposed the war in Iraq precisely because I believe that we must exercise restraint in the use of military force, and always consider the long-term consequences of our actions. We have been at war now for eight years, at enormous cost in lives and resources. Years of debate over Iraq and terrorism have left our unity on national security issues in tatters, and created a highly polarized and partisan backdrop for this effort. And having just experienced the worst economic crisis since the Great Depression, the American people are understandably focused on rebuilding our economy and putting people to work here at home.

Most of all, I know that this decision asks even more of you -- a military that, along with your families, has already borne the heaviest of all burdens. As President, I have signed a letter of condolence to the family of each American who gives their life in these wars. I have read the letters from the parents and spouses of those who deployed. I visited our courageous wounded warriors at Walter Reed. I've traveled to Dover to meet the flag-draped caskets of 18 Americans returning home to their final resting place. I see firsthand the terrible wages of war. If I did not think that the security of the United States and the safety of the American people were at stake in Afghanistan, I would gladly order every single one of our troops home tomorrow.

So, no, I do not make this decision lightly. I make this decision because I am convinced that our security is at stake in Afghanistan and Pakistan. This is the epicenter of violent extremism practiced by al Qaeda. It is from here that we were attacked on 9/11, and it is from here that new attacks are being plotted as I speak. This is no idle danger; no hypothetical threat. In the last few months alone, we have apprehended extremists within our borders who were sent here from the border region of Afghanistan and Pakistan to commit new acts of terror. And this danger will only grow if the region slides backwards, and al Qaeda can operate with impunity. We must keep the pressure on al Qaeda, and to do that, we must increase the stability and capacity of our partners in the region.

Of course, this burden is not ours alone to bear. This is not just America's war. Since 9/11, al Qaeda's safe havens have been the source of attacks against London and Amman and Bali. The people and governments of both Afghanistan and Pakistan are endangered. And the stakes are even higher within a nuclear-armed Pakistan, because we know that al Qaeda and other extremists seek nuclear weapons, and we have every reason to believe that they would use them.

These facts compel us to act along with our friends and allies. Our overarching goal remains the same: to disrupt, dismantle, and defeat al Qaeda in Afghanistan and Pakistan, and to prevent its capacity to threaten America and our allies in the future.