Open Graph is a language for structuring content and sharing that goes on in other apps, and we're continuing to build it out longer term. But we found we need to build more specific experiences around categories like music or movies. Where we've taken the time to build those specific experiences, stuff has gone quite well.

Everybody's concept of having a friend is different. It can definitely blur the relationships that exist between people. But in the end, I think that Facebook can only reinforce preexisting communities.

Every application will be designed from the ground up to use real identity and friends.

We're at a point now where we've built AI tools to detect when terrorists are trying to spread content, and 99 percent of the terrorist content that we take down, our systems flag before any human sees them or flags them for us.

We think the fact that Instagram is connected to other services beyond Facebook is an important part of the experience...This is an important milestone for Facebook because it's the first time we've ever acquired a product and company with so many users.

Millions of people around the world love the Instagram app and the brand associated with it, and our goal is to help spread this app and brand to even more people.