Facebook CEO Mark Zuckerberg is back on Capitol Hill today to answer questions from Congress.
In the second of two hearings, Zuckerberg faces members of the House of Representatives on today to answer questions about protecting user data.
He spoke to members of the U.S. Senate on Tuesday.
The hearings follow the news that the data-mining and political consulting firm Cambridge Analytica obtained personal information of up to 87 million Facebook users. The firm is accused of using that information for political advertising in 2016.