The U.S. and Canada are two generous governments and we reach out and partner with anyone who believes in foreign aid.

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.

Although I don't have a prescription for what others should do, I know I have been very fortunate and feel a responsibility to give back to society in a very significant way.

Never before in history has innovation offered promise of so much to so many in so short a time.

With tech companies, whoever's the leader is always questioned, you know. They say, 'Is this the end of them?' And - there's more - more times people think that's the case than it really is the case.

Depending on how quickly you get ocean rise, you have people who live in river deltas [at risk]. Bangladesh is largely a river delta, and the rising sea level means that when storms come in, the human sanitation is backing up, the ability to farm, it's destructive-type situations like you saw in New Orleans with Katrina. You're increasing the frequency of that stuff in low-lying areas fairly dramatically.

The advance of technology is based on making it fit in so that you don't really even notice it, so it's part of everyday life.