The quicker we get about the business of reducing our reliance on oil the better.

So I think, if September 11 taught us anything, it taught us that we're vulnerable, and vulnerable in ways that we didn't fully understand.

I certainly have no regrets about overthrowing Saddam Hussein. I'd do it again. And, yes, there are a lot of things that I think we'd all do differently. Maybe we made some erroneous assumptions about the fabric of the society in Iraq and about the solidity of some of the institutions. And yes, there are a lot of things I would do differently. I'd probably work to rebuild Iraq from the outside in, rather than concentrating so much on Baghdad, for instance.

Even when you cherish democratic ideals, it is never easy to turn them into effective democratic institutions. This process will take decades.

The growth of entrepreneurial classes throughout the world is an asset in the promotion of human rights and individual liberty, and it should be understood and used as such. Yet peace is the first and most important condition for continued prosperity and freedom. America's military power must be secure because the United States is the only guarantor of global peace and stability. The current neglect of America's armed forces threatens its ability to maintain peace.

There is nothing better than being in a classroom with really, really brilliant students, and opening up new worlds to them. That's what I love doing.

I'm very proud that President [George W.] Bush took on AIDS relief. It was the largest single response by any country to a major international health crisis, and there are millions of people who are alive today in Africa and other developing countries because of that program.