There's no such thing as going to a soapbox and saying, 'The government's corrupt,' and not having the intelligence service see your face. In the digital world, that can be done.

Our work in global health is about things like cutting childhood deaths, and every year we continue to make progress there.

We believe unbelievable progress can be made, in both inventing new vaccines and making sure they get out to all the children who need them.

It's OK for China to invent cancer drugs that cure patients in the United States. We want them to catch up. But as the leader, we want to keep setting a very, very high standard. We don't want them to catch up because we're slowing down or, even worse, going into reverse.

Married life is a simpler life. Who I spend my time with is established in advance.

I don't have any TVs with their over-the-air receivers connected in my house. But when I'm in a hotel room or other places that have a TV, then I turn it on and flip the channels just like everybody else. I'm not immune to the lures of television. I just try to stay away from it because I like to read.

Security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally.