Facebook CEO Mark Zuckerberg will testify before a Senate joint committee of both Judiciary and Commerce, Science, and Transportation on ‘Facebook, Social Media Privacy, and the Use and Abuse of Data.’ The senators are expected to ask questions on how Facebook handles user data and how Cambridge Analytica was able to influence Facebook users.

Also read: Facebook Watch: Zuckerberg’s Q&A, political ads, health data and more

This isn’t the first time Facebook has been forced to testify about the vulnerabilities of its platform before Congress: in October, Facebook, along with Google and Twitter, were asked to account for how their networks were used by foreign agents to influence the 2016 election. Zuckerberg was spared from the grilling, though, and Facebook got away with simply sending the company’s top lawyer to DC.

Full video of the testimony

We’re live blogging the entire thing here: