Zuckerberg appeared before the United States Senate Judiciary and Commerce committees after it came to light that private information of 87 million Facebook users was harvested by the British political consulting firm, Cambridge Analytica, which worked on Donald Trump's presidential campaign.
Zuckerberg will testify again on Wednesday before the House Energy and Commerce Committee.
During Tuesday's hearing, 44 senators will each have four minutes to question the embattled face of Facebook.
Facebook chief executive Mark Zuckerberg told lawmakers Tuesday that he does not believe his company is a monopoly.
The exchange could support the notion that Zuckerberg doesn't stay involved in the decisions he purports to care the most about - ones involving users and the community - within the company that he founded and runs.
China Inflation Data Due On Wednesday
There were also declines in the cost of telecommunication, used cares and trucks, tobacco and education. Gains in raw material prices slowed to 5.1 per cent in March from 5.9 per cent the month before.
As Facebook boss Mark Zuckerberg testified on Capitol Hill for the first time, an unnerving sight greeted visitors outside: an "army" of 100 life-sized cutouts of the CEO.
The social media pioneer admitted "we have made a lot of mistakes" and "I'm sorry", repeatedly making references the company's "origin story" of being set-up in his Harvard dorm room.
In February, Mr Mueller's office charged 13 Russians with interference in the 2016 election, along with three Russian companies.
As for the federal Russian Federation probe that has occupied much of Washington's attention for months, he said he had not been interviewed by special counsel Mueller's team, but "I know we're working with them".
The Cambridge Analytica data leak has also prompted the Indian government to take notice.
Liverpool's Mohamed Salah named PFA Player of Month for March
I don't think it is really serious and he can be available for Tuesday but for today he wasn't available. The Germany midfielder sustained a back injury last month and has been out of action since.
Zuckerberg had gone through rigorous training sessions with lawyers, consultants and advisers in the days before the hearing.
Zuckerberg arrived in Washington and met with lawmakers on Monday, apologizing before the hearings even began.
Absolutely, Zuckerberg responded, saying later in an exchange with Sen.
Senator Tammy Baldwin asks whether the Cambridge University neuroscientist Aleksandr Kogan sold the Facebook data to anyone besides Cambridge Analytica?
"My position is not that there should be no regulation", Zuckerberg said.
"We believe we are in compliance with that consent order", he said. But privacy advocates charge that users' Facebook friends didn't get the same opportunity to opt into to having their information shared. Republicans have yet to get behind any such legislation, but that could change. Cornyn said apologies are "not enough" and suggested that legislation could eventually be needed to give consumers more control over their own data privacy.
Nitish Kumar, PM Modi share warm vibes, dais at Motihari
During his speech, Narendra Modi said that Bihar is the state that elevated and transformed Mahatma Gandhi into Bapu. He said, "In the last one week, more than 8,50,000 toilets have been constructed in Bihar ".