Facebook CEO Mark Zuckerberg is testifying before a House committee Wednesday, his second day of grilling by lawmakers over concerns about users' privacy. The 33-year-old Facebook CEO faced tough questioning from a joint hearing of the US Senate's Commerce and Judiciary committees on Wednesday.
Facebook banned the app in 2015, but the data collected was not destroyed, in violation of Facebook's personal data policy.
Politicians in the U.S. and United Kingdom are weighing up the possibility of legislation to regulate large technology companies like Facebook, Google and Twitter which are accused of failing to regulate themselves.
And Lujan had more hard questions for the Facebook founder.
But he stiffly defended Facebook's use of the data and postings of the 2.2 billion users of its free platform - in order to attract the ad revenue that the $480 billion company depends on.
"In principle, I think that makes sense, and the details matter, and I look forward to having our team work with you on fleshing that out", Zuckerberg said.
Shares are down 16% from the all-time high that they hit before the Cambridge Analytica data scandal, which Facebook now says has affected 87 million users, first came to light.
Facebook said you can prevent apps and websites from misusing your information. Earlier this week, notifications began appearing at the top of News Feeds to let users know if they used the This Is Your Digital Life quiz app, which is the app that allowed the data firm to harvest information from up to 87 million users. Lindsey Graham about whether Facebook is a monopoly, and today has also (so far) produced one good round of questions. "We assure we will do our best to maintain the integrity of upcoming elections in India". "Now, that threat went straight through your detection systems, it spread very quickly, and then it took attempt after attempt after attempt, and the involvement of civil society groups, to get you to remove it", the Senator said.