In a world that's changing so quickly, you're guaranteed to fail if you don't take any risks.

I think I've grown and learned a lot.

We are working hard to build a service that everyone, everywhere can use, whether they are a person, a company, a president or an organisation working for change

You hear these stories about people who take apart their radio and put it back. Or just learn a lot from taking it apart. But I wasn't as into that stuff as I was just into how computer programs work.

We want Facebook to be one of the best places people can go to learn how to build stuff. If you want to build a company, nothing better than jumping in and trying to build one. But Facebook is also great for entrepreneurs/hackers. If people want to come for a few years and move on and build something great, that's something we're proud of.

When people are connected, we can just do some great things. They have the opportunity to get access to jobs, education, health, communications. We have the opportunity to bring the people we care about closer to us.

The most important thing is to keep your team as small as possible.