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Zuckerberg's testimony is over, but scrutiny is just ramping up

Mr Zuckerberg says he is open to the idea of regulation, but would need to see the specifics of any bill in order to agree wholeheartedly.

San Francisco

FOR 14 years, Mark Zuckerberg was free to use any means he could imagine to build his social network into an Internet and advertising colossus with tens of billions of dollars in revenue. Now the US Congress is waking up to what that freedom meant for Facebook Inc users.

The chief executive officer's first congressional testimony - roughly 10 hours answering to US Senate and House lawmakers over the past two days - kick-started a new era of government scrutiny of Facebook, whose swift emergence outpaced any regulations on the books at its founding. While questions ranged from data privacy to prescription drug sales to employee diversity, most lines of inquiry highlighted the challenge of trying to grasp and confront Facebook's immense power in consumers' lives, in ways most of its users don't completely understand.

Congress is looking more broadly at Facebook's reach, beyond the user data leaks that brought Mr Zuckerberg to testify. While investors were cheered by Mr Zuckerberg's calm responses to barrages of questions, many lawmakers have begun to express outrage at the ways the company has run its business for years. There were dozens of unanswered or follow-up questions that the executive promised his team would respond to later, and some of his talking points aren't likely to hold up to future analysis.

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The 33-year-old Mr Zuckerberg frequently argued, for example, that Facebook's two billion users - not the company - own the data they share via its network, and can decide whenever they wish to prevent Facebook from having it. That line almost worked, until Representatives Kathy Castor, a Florida Democrat, and Ben Lujan, a New Mexico Democrat, pointed out that the company is collecting personal data on people who don't use the social network and have never signed a privacy agreement.

Mr Zuckerberg said that the company tracks non-users for "security purposes", without elaborating. But there were further questions about the information Facebook collects on members who are logged out of the social network, on websites that track Facebook users in hidden ways - an option the company openly touts to advertisers but most users aren't aware of.

Mr Zuckerberg didn't know how to answer some of the queries about that tracking, and told representatives that his staff would follow up.

Members of Congress in both houses prodded Mr Zuckerberg frequently about failure to police the content on his platform, too. In some instances, they worried that Facebook wasn't taking down harmful content fast enough, like fake profiles of people who are stealing pictures from real people, as well as posts seeking to recruit for terrorist ideologies.

"Where's your accountability?" Representative David McKinley, a West Virginia Republican, asked Mr Zuckerberg after demonstrating that there were still posts on Facebook illegally offering opiate drugs.

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.

Responding to lawmakers' complaints about how Facebook handles content, Mr Zuckerberg explained that the company has the opportunity to better moderate its site once it develops an artificial intelligence (AI) solution, which may take months or years. Such a system might have the potential to block bad posts before they spread, without humans needing to make subjective decisions in individual cases. But Mr Zuckerberg didn't mention that AI is just a term for a computer program designed by humans who may have their own biases, just like Facebook's algorithm.

Senator Lindsey Graham, a Republican from South Carolina, questioned Mr Zuckerberg about Facebook's power more broadly: Is the social network a monopoly? Mr Zuckerberg came prepared with a data point about how most people use eight different apps to keep in touch with friends and family - a number that may include email and text messaging, which aren't direct competitors of Facebook. He also didn't say how many of those eight might be Facebook's popular subsidiary apps, which include Instagram, Messenger and WhatsApp.

"Contrary to Mr Zuckerberg's assertion, Facebook is a virtual monopoly and monopolies need to be regulated," Mr Graham said after the hearing.

Luckily for Menlo Park, California-based Facebook, lawmakers aren't aligned on exactly what regulation would look like, or if written laws or rules are even necessary. Some said they wanted Facebook to try its hand at self-regulation first, while others asked Mr Zuckerberg to propose policies. Mr Zuckerberg said he was open to the idea of regulation, but would need to see the specifics of any bill in order to agree wholeheartedly. Congress is unlikely to get it done during this session.

For now, legislators will be asking many follow-up questions - first of all about the problem that brought Mr Zuckerberg to Congress. Information from as many as 87 million users was obtained by an app developer claiming to be doing academic research, who then sold those personal details to Cambridge Analytica, a British firm with ties to US President Donald Trump's 2016 campaign.

Mr Zuckerberg said the company is auditing tens of thousands of apps to find other such leaks, and will inform affected users when it identifies them. BLOOMBERG