This will not be a campaign of half measures, and we will accept no outcome except victory.

I've directed the full resources of our intelligence and law enforcement communities to find those responsible and bring them to justice. We will make no distinction between the terrorists who committed these acts and those who harbor them.

On 9-11, we discovered that we cannot escape from the world. To me personally, this was a life-changing experience, and I realized, as did all Americans, in a way that is impossible to describe, that we were not protected by the two oceans. It was necessary to eliminate threats before they showed up on our doorstep. I agree that we should not be getting caught up in far away wars. But I believe Iraq was central to our war on terrorism.

The terrorist attacks on September the 11th were a turning point for our nation. We saw the goals of a determined enemy to expand the scale of their murder and force America to retreat from the world. And our nation accepted a mission. We will defeat this enemy. The United States of America is determined to guard our homeland against future attacks. As the September 11th Commission concluded, our country is safer than we were three years ago, but we are not yet safe

The Oval Office is a place where there's been, obviously, a lot of amazing experiences over a seven-and-a-half year period. My presidency is one where I've had to make some very tough decisions. I guess some presidencies are kind of - were real smooth, there were no real big issues. Well, that's not the way mine is.

I was popular at some times and not so popular at other times. But what mattered was trying to solve problems and deal with circumstances. Some of which I was able to anticipate. Some of which caught us totally by surprise.

When you're writing about something that happened, it helps you transition to the present. Ironically enough, by focusing on your presidency, it helps you realize that you're no longer the president. By reliving moments, it helps you stay focused on the moment.