Zuckerberg: "this was a massive breach of trust, and I'm really sorry this happened..." Says FB must limit access developers have going forward, make sure there aren't any more Cambridge Analyticas out there- will investigate every app that had access before FB locked down access
Zuckerberg says FB will notify the 50 million people that were impacted, that Facebook will build a tool. He says anyone whose data "might have been affected" will receive a notification. This is a victory for activists who have pushed for such a broad notification.
Why didn't FB tell users that there data was stolen? Zuckerberg says FB immediately banned Kogan's app, asked for a formal certification they had deleted.
Why didn't FB follow up? Zuckerberg says he put too much trust in third-party developers. The company will no longer "just take people's word for it".
How do you know there aren't hundreds more companies like Cambridge Analytica who have violated Facebook's policies? Zuckerberg says they have to go and check all of the apps.
"It's hard to know what we'll find, but we're going to review thousands of apps," says Zuckerberg. "This is our responsibility to our community."
.@andersoncooper brings in @LaurieSegallCNN, @brianstelter and @AllMattNYT to react to Zuckerberg. Laurie believes he is taking it really seriously; but disagrees he is really getting in front of this. Matt disputes the notion that FB was a victim, as it has portrayed itself.
.@AllMattNYT: Facebook needs to own up to the fact that it did not publicly acknowledge this issue. @brianstelter: the argument from Facebook is we are confronting the problems of the past, but this story shines a bright light on a dark corner of the web- our privacy, our data...
.@brianstelter ... And how Facebook uses it. This is part of a series of scandals. From the Russia scandal to fake news to Cambridge Analytica, it makes you wonder what to expect from this company in the future.
Zuckerberg: "If you told me in 2004 that a big part of my job would be to protect election integrity against interference by other governments, I would not have believed that I would have had to work on that 14 years later."
"In 2016 we were not on top..." of these issues, Zuckerberg says. But he believes things went better in France, talks of AI tools deployed there, and in the Alabama special election. "This isn't rocket science," says Zuckerberg. "There is a lot more work we need to do..."
Do you think that bad actors are using Facebook at this moment to meddle in the midterm elections? "I'm sure someone is trying." Do you know what the tactics are? "Yes, and we have some sense of what we need to get in front of."
"What we see are a lot of folks trying to sow division.... most of what [the Russians] did was not directly about the election, but was more about dividing people." Groups pro and against immigration reform, for instance. Refers to AI tools again to knock out fake accounts.
Will you testify to Congress? "Happy to .... if it's the right thing to do." Typically there are people who have more expertise, says Zuckerberg, but happy to do it.
"There is an element of accountability," says Zuckerberg, "that I should be out there doing more TV interviews."
Knowing what you know now, do you believe that Facebook had an impact on the outcome of the 2016 election? "That's really hard," says Zuckerberg. When you add it all up, it's hard to assess.
Why shouldn't Facebook be regulated? "I'm actually not sure we shouldn't be regulated." Technology is important and perhaps regulation is needed. The question is what type of regulation. Points to the Honest Ads act, for instance. Says Facebook already rolling out tools for this.
Softball question about how Zuckerberg has changed since he had kids. "Will my girls be proud of what I did today?" he says is his north star.
.@brianstelter- Zuckerberg is a world leader- he can shape elections and impact events, even wars. Headline- he is willing to testify, he is open to regulation.
.@LaurieSegallCNN says people want to see Zuckerberg show up and testify, that they want to hear straight from him. He's one of the most powerful people in the world- you want our tech leaders to grow up, and want to protect us. We need more transparency. 
.@AllMattNYT "I have a question- Zuckerberg is talking about moving forward, but the whistleblower in this case...@chrisinsilico his reward for coming forward, facing legal issues, was to be suspended by Facebook, to be treated like a suspect. Why treat him like a criminal?"
Good question for Zuckerberg:
This is the reality:
Zuckerberg has given an interview to @WIRED's @nxthompson an interview that posted at 9 pm, concurrent with the CNN interview. wired.com/story/mark-zuc…
Good that 50M users will be notified but also seems important this data set be shared with the govt or independent third party for analysis, so the public can understand who, big picture, was targeted. Otherwise the only parties with a 30K foot view are CA, their comrades, & FB.
A key question that @LaurieSegallCNN did not ask:
Another perspective worth taking into account:
Questions on the notification- will it be proactive, or buried in the Help Center?
The engineer believes the solution is more engineering?
