PHOTOS: Mark Zuckerberg testifies before Congress amid Facebook privacy concerns

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Tuesday, April 10, 2018
Facebook CEO Mark Zuckerberg testifies before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington.
Facebook CEO Mark Zuckerberg, left, testifies before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington, Tuesday.
Sen. John Thune, R-S.D., center, questions Facebook CEO Mark Zuckerberg as he testifies before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill.
Sen. Jerry Moran, R-Kan., left, accompanied by Sen. Ben Sasse, R-Neb., right, takes a photo as Facebook CEO Mark Zuckerberg testifies.
Sen. Bill Nelson, D-Fla., right, accompanied by Sen. John Thune, R-S.D., left, and Sen. Chuck Grassley, R-Iowa, second from left, speaks as Facebook CEO Mark Zuckerberg testifies.
An audience member wearing a blue and green pointy wig, aiming to look like a Russian troll as Facebook CEO Mark Zuckerberg testifies.
Members of the audience hold up signs and wear sunglasses that read "Stop Spying" before CEO Mark Zuckerberg arrives to testify.
Facebook CEO Mark Zuckerberg arrives to testify before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington.
Facebook CEO Mark Zuckerberg arrives to testify before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington.
Facebook CEO Mark Zuckerberg testifies before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington.
Facebook CEO Mark Zuckerberg arrives to testify before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington.
Advocacy group Avaaz placed 100 cardboard cutouts of Mark Zuckerberg outside the U.S. Capitol in Washington on the day of his testimony to Congress.
Advocacy group Avaaz placed 100 cardboard cutouts of Mark Zuckerberg outside the U.S. Capitol in Washington on the day of his testimony to Congress.
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PHOTOS: Mark Zuckerberg testifies before Congress amid Facebook privacy concernsFacebook CEO Mark Zuckerberg testifies before a joint hearing of the Commerce and Judiciary Committees on Capitol Hill in Washington.
Andrew Harnik/AP Photo

Facebook CEO Mark Zuckerberg testified before congress after a privacy leak that affected millions of users.