Updated at 2:55 p.m.| The joint Senate hearing with Facebook CEO Mark Zuckerberg is off and running.
Zuckerberg, as witness, is expected to be grilled by members of both the Senate Judiciary and Commerce committees about the protection of user data after revelations in recent weeks that millions of users′ information were obtained improperly by Cambridge Analytica.
Here’s the Facebook hearings in photos:
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