I think, in fact, the situation with respect to al Qaeda, to say that, you know, that was a big attack we had on 9/11, but it's not likely again, I just think that's dead wrong. I think the biggest strategic threat the United States faces today is the possibility of another 9/11 with a nuclear weapon or a biological agent of some kind. And I think al Qaeda is out there even as we meet, trying to figure out how to do that.

We've gotten a long way on missile defense. We know how to do it. We know how to take down incoming warheads, but we need to do a lot more work in order to be - to deploy a system that'll defend the United States against those kinds of limited strikes that might be possible by a nuclear armed North Korea or Iran.

We have to deal with this new type of threat in a way we haven’t yet defined. . . . With a low-probability, high-impact event like this . . . If there’s a one percent chance that Pakistani scientists are helping al Qaeda build or develop a nuclear weapon, we have to treat it as a certainty in terms of our response.

The only thing left that shows I was a heart patient is I have a scar down the middle of my chest where they went in three times to do open heart surgery. I have a brand new heart inside, and all the mechanical and electronic gear and so forth is all gone.

It's not just Bin Laden or just those that are involved in the counterterrorism effort. We've gotta cast the net broader than that. But I think it's a - very special tribute that we all owe to the bravery and courage of the men and women in the intelligence and military business who performed so well to finally get it done.

Conservation may be a sign of personal virtue, but it is not a sufficient basis for a sound, comprehensive energy policy.

As I think about the future, I'm back where most people live their lives. Which is, death is not imminent, and that's different.