Highlights From Facebook Whistleblower Testifying At Senate Hearing

Watch highlights from Facebook whistleblower’s testimony at Senate hearing. Former Facebook producer manager Frances Haugen says that the big tech company knowingly harms its users.  » Subscribe to NBC News: » Watch more NBC video: NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features , , , Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows.