The furore over the activities of Cambridge Analytica and its links to political parties in India highlights the perils of data breach, fraudulent invasion of privacy and manipulation of personal details of the social media users.
Every company in Europe or with European users will be be covered. "They came to office in the days following election recruiting and were very candid that they allowed us to do things they wouldn't have allowed someone else to do because they were on our side". "It was my mistake, and I'm sorry", he said.
Many senators focused on Facebook's lengthy user agreement, and Grassley wondered why Facebook doesn't disclose all the ways it uses and shares data.
"I am indeed wary that you are only acting now out of concern for your brand and are making changes that should have been made long ago", Democrat Paul Tonko said.
"It then becomes a question of who is going to regulate the truth", he said.
It's unclear how numerous 87 million affected users have received their notices.
Cambridge Analytica suspended its previous CEO, Alexander Nix, one day after he alluded to tactics of the firm that may have violated US campaign finance laws in a hidden-camera expose by Britain's Channel 4.
Yassmin Abdel-Magied says 'I'm being deported' from US
Ms Abdel-Mageid left Australia a year ago to partake in what she called an "Aussie rite of passage". The controversial Muslim youth activist was deported only three hours after arriving in the U.S.
Later in his testimony, Zuckerberg again repeated that the ad version is the better version of Facebook.
Here's what Facebook says it tracks when you're not logged in: "We receive info about the web page you're visiting, the date and time and other browser-related info". And doubtless uses that data to serve up the right audiences to advertisers-which is the company's main revenue model.
"Would you be comfortable sharing with us the name of the hotel you stayed in last night?" said Sen.
Zuckerberg disclosed that his company is "working with" special counsel Robert Mueller in the federal probe of Russian election interference.
Earlier this year Mueller charged 13 Russian individuals and three Russian companies in a plot to interfere in the 2016 presidential election through a social media propaganda effort that included online ad purchases using US aliases and politicking on USA soil.
He spoke of a constant struggle to guard against Russian manipulation of the Facebook platform to influence elections in the USA and elsewhere. "The specifics of this situation, I'm not up to speed..." said Zuckerberg, before Rep. On Tuesday, Senator Ted Cruz asked the 33-year-old exec about Facebook's "pervasive pattern of political bias" - something Zuckerberg shot down and said he was concerned about himself.
"So this is an arms race".
Facebook had lost about $100 billion in value since February. "Yes, we store data. some of that content with people's permission", Zuckerberg told the committee.