Here's an excerpt.
We have made many mistakes since 2003, and these will not be easily reversed. But from everything I witnessed on my most recent visit, I believe that success is still possible. Even greater than the costs incurred thus far and in the future are the catastrophic consequences that would ensue from our failure in Iraq. By surging troops and bringing security to Baghdad and other areas, we will give the Iraqis the best possible chance to succeed. Our national security, and that of our friends and allies, compels us to make our best effort to prevail, and to do it now.