I spent five years of my youth in prison - some very bad prisons.

A lot of times, when I met somebody and took them out on a date, I obviously didn't tell them my background, because I didn't think I'd see them but once or twice.

If I check into a hotel, a lot of times, they know who I am.

I owe a debt to my country 800 times greater than I could ever repay.

You cannot make thousands of universities or hundreds of thousands of professors, but with technology and the Internet you can have great courses and make a digital university.

Of course, I have my own limits as to how much game software I can take care of at any one time.

Somewhere along the way, when we were building social media products, we forgot the reason we like to communicate with our friends is because it's fun.

As a research tool, the internet is invaluable.