My friends are people who like building cool stuff. We always have this joke about people who want to just start companies without making something valuable. There's a lot of that in Silicon Valley.

Connecting everyone is going to be something that no single company can do by themselves. So I'm really glad that they and a lot of other companies are working on this.

At Facebook, we build tools to help people connect with the people they want and share what they want, and by doing this we are extending people's capacity to build and maintain relationships.

Right now, with social networks and other tools on the Internet, all of these 500 million people have a way to say what they're thinking and have their voice be heard.

I look at Google and think they have a strong academic culture. Elegant solutions to complex problems.

It only took me two weeks to build the first version of Facebook because I had so much stuff before then.

The thing that we are trying to do at Facebook is just help people connect and communicate more efficiently.