During almost five hours of questioning by 44 USA senators, Mr Zuckerberg repeated apologies he previously made for a range of problems that have beset Facebook, from a lack of data protection to Russian agents using Facebook to influence United States elections.
Zuckerberg faced questions about the future of his company.
Facebook CEO Mark Zuckerberg acknowledged that regulation of social-media companies is "inevitable" and disclosed that his own personal information has been compromised by malicious outsiders. Ben Lujan, Mark admitted that Facebook occasionally collects data from people who have not signed up to the platform "for security reasons".
Several Republicans also strongly voiced their concerns on the opposite end of the spectrum - that over-regulating or policing of the platform would lead to anti-conservative bias and a general silencing of offensive opinions.
Zuckerberg and his creation are in trouble, it appears, with Facebook's share price all over the shop. Such a system might have the potential to block bad posts before they spread, without humans needing to make subjective decisions in individual cases.
Are Video Games Getting More Intellectual?
And because of this, games that focus on history, geography, or other elements of the real world can now almost be educational. It may sound somewhat hard to believe, but there have already been artistic exhibitions for people’s Tilt Brush designs.
Of course, anybody else who owns Facebook shares have benefited as well.
For instance, Rep. Chris Collins of NY asked Zuckerberg "what data was being collected" when Cambridge Analytica got its hands on the data of tens of millions of Facebook users in 2014. Davidsen also said they received approval from Facebook because they "were on our side".
The second day of Zuckerberg's mega roast wasn't easy for him.
Could this be setting Facebook up for an antitrust battle? Sen. Throughout the hearings, members of Congress struggled to understand how Facebook works, let alone to diagnose and agree on the precise problems that should be fixed by regulation. Congress is unlikely to get it done during this session.
The hearings came almost a month after news broke that Cambridge Analytica, a data firm with ties to President Donald Trump's campaign, accessed information from as many as 87 million Facebook users without their knowledge. And in the past, Facebook has described various forms of data collection that don't involve users directly giving it to the social network. "How is today's apology different?"
House Energy and Commerce Chairman Greg Walden said the committee will look at what could be done.
Facebook disclosed in September that Russians under fake names used the social network to try to influence U.S. voters in the months before and after the 2016 election, writing about inflammatory subjects, setting up events and buying ads. It's not just about privacy, said Representative John Sarbanes, a Democrat from Maryland.
Facebook is neither a media or a financial institution, he said.