As on Tuesday, the questions are expected to cover a broad range of topics - from what Facebook knew about the Cambridge Analytica scandal to the degree of responsibility Facebook has over content on its platform, including disinformation.
The Intercept reported Cambridge Analytica used harvested data to construct about 30 million "psychographic" profiles of voters.
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On the heels of Facebook chief executive Mark Zuckerberg's two-day congressional testimony to address the Cambridge Analytica scandal and the company's failure to protect users' personal data, new polling indicates a growing number of the social media network's users are "very concerned" about invasion of privacy when using the website.
SELYUKH: I mean, it's Congress.
Zuckerberg further noted that the counter-terrorism team had designed systems, which helped to proactively flag terrorist groups' communication, thereby removing their accounts automatically.
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Yes, numerous illustrious senators and representatives assembled devoted their limited minutes with the CEO of one of the biggest companies in the United States to addressing some very simple elements of how Facebook works (which is lucky for Zuckerberg because he had to concentrate most of his energy on modulating his face in the very natural way that humans do). Now the site basically regulates itself. But there's a third kind of data: data that is derived, inferred, or predicted from the data that people share and that is recorded about their behavior. This is much different to Europe, which has more rigid rules about personal data. For this appearance, however, he has clearly had a ton of media training, and he has appeared calm and collected - even managing to crack a joke or two.
Facebook is accused of not doing enough to stop the malevolent use of personal data that had been hijacked and resold to the Trump campaign and other Republicans by a research firm based in the United Kingdom.
Zuckerberg replied, "No, Congressman".
If it's even possible to tot up how many buttons are out there on the web, expect a number in the hundreds of millions - that's hundreds of millions of pages with which Facebook is tracking your activity beyond its own borders.
Zuckerberg was adamant that AI would iron out problems of regulating content in the future. How hard is it for an algorithm to recognise a racial slur, for example?
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Zuckerberg told Senator Orrin Hatch (R-UT) that there would always be a free version of Facebook, but that a paid option might be a possibility later.
On the topic of Europe's General Data Protection Regulation, Reuters reports that the European Union is now going even further, establishing a Social Media Working Group to take a deeper dive into the harvesting of personal data by Facebook and others.
Looking through the transcripts, I've counted more than 20 instances where Mr Zuckerberg promised to get back to representatives with more information.
"Some stand out quotes included...."
Even, apparently, to Mr Zuckerberg himself.
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Democrats plan to question Zuckerberg Wednesday about political advertising on Facebook, given the Trump campaign's extensive use of the site during the 2016 campaign, Rep. John Sarbanes, D-Md., a member of the panel, told ABC News Tuesday. It was created in 2003 and existed for only a couple of days before Harvard made him close it down.