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Facebook CEO Mark Zuckerberg owes lawmakers answers to these questions
Illustration: David Foster
Illustration: David Foster

Update: On Monday, June 11, Facebook turned in 229 pages of answers to the lawmakers’ questions, including information on how its Newsfeed prioritizes stories.

For Mark Zuckerberg and Facebook, this week was a trial by fire.

Over the course of two days (April 10-11), senators on the Senate Judiciary and Commerce Committees, as well as representatives from the U.S. House Energy and Commerce Committees, grilled Facebook’s (FB) 33-year-old CEO on a number of matters, including the recent Cambridge Analytica scandal, the company’s role in the 2016 U.S. presidential election, and its position on government regulation regarding user privacy.

And while Zuckerberg’s testimony was widely viewed as a successful defense of the company he started in 2004 — Facebook’s stock was up 4.5% at market close the first day of hearings — there were many questions Zuckerberg left unanswered.

Update: Facebook’s response

Facebook has responded to Rep. Debbie Dingell (D-Michigan) on how many Facebook “like” and “share” buttons there are on non-Facebook web pages, as well as “how many chunks of Facebook pixel code are there on a non-Facebook webpage.”

Things not addressed during the Senate hearing:

  • Zuckerberg promised Sen. Chuck Grassley (R-Iowa) he would get back to him with “all the examples of apps” Facebook has banned as a result of an audit covering “tens of thousands of apps.” “If we find that they’re doing anything improper, we’ll ban them from Facebook, and we will tell everyone affected.”

  • Zuckerberg told Grassley he does not have the “exact figure” of how many times Facebook required an audit to “ensure the deletion of improperly transferred data,” but added he would have his team follow-up with him.

  • Zuckerberg told Sen. Dianne Feinstein (D-Calif.) his team will get back to her about the “tens of thousands of fake accounts” and whether they could be “specifically” attributed back to Russian intelligence.

  • Zuckerberg told Sen. Maria Cantwell (D-Wa.) he would get back to her on whether any Facebook employees worked with Cambridge Analytica.

  • Zuckerberg told Sen. Roger Wicker (R-Miss.) he would get back to him about whether Facebook tracks user activity once a user logs off Facebook. Zuckerberg also promises to circle back with methodology about how it discloses to users this type of tracking.

  • Zuckerberg told Sen. Lindsey Graham (R-SC) he will have his team circle back with him about some proposed regulations. “We can have this discussion across the different categories where I think that this discussion needs to happen.”