We have to be the best global citizens we can be.

We have to fight the terrorists as if there were no rules and preserve our open society as if there were no terrorists.

Why is it Muslims from Pakistan or from Egypt come to America and thrive, and they are frustrated back home? It's about clean government. It's about a rule of law. It's about intellectual property protection. They've got all the talent and energy of anybody else. As new immigrants they may have more of it, so you put them in our system and they become doctors, lawyers, and businessmen and entrepreneurs.

The historical debate is over. The answer is free-market capitalism.

I think that competition will exist even if we discover more oil. We're never going to know how much we have, or how long will it last. You are always going to want to have diversity of supply. I think the Middle East will remain a region of competition, of global competition, fighting for a long time.

Do you know what my favorite renewable fuel is? An ecosystem for innovation.

By 'flat' I did not mean that the world is getting equal. I said that more people in more places can now compete, connect and collaborate with equal power and equal tools than ever before. That's why an Indian in Bangalore can take care of the office work of American doctors or read the X-rays of German hospitals.