The community - more than two billion people use our products, and we get that, with that, a lot of people are using that for a lot of good, but we also have a responsibility to mitigate the darker things that people are gonna try to do.

Our goal with fake news is not to prevent anyone from saying something untrue - but to stop fake news and misinformation spreading across our services.

I'm Jewish, and there's a set of people who deny that the Holocaust happened. I find that deeply offensive. But at the end of the day, I don't believe that our platform should take that down because I think there are things that different people get wrong.

If something is spreading and is rated false by fact checkers, it would lose the vast majority of its distribution in News Feed. And of course if a post crossed line into advocating for violence or hate against a particular group, it would be removed. These issues are very challenging but I believe that often the best way to fight offensive bad speech is with good speech.

Video is growing very quickly on Facebook. A lot of people compare that to YouTube. I think that kind of makes sense. YouTube isn't the only video service, but I think it's the biggest, and it probably makes more sense to compare Facebook video to YouTube rather than Netflix because that's a completely different kind of content.

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.