In this Wednesday, Nov. 1, 2017, file photo, from left, Facebook's General Counsel Colin Stretch, Twitter's Acting General Counsel Sean Edgett, and Google's Senior Vice President and General Counsel Kent Walker, are sworn in for a Senate Intelligence Committee hearing on Russian election activity and technology, on Capitol Hill in Washington. (AP/Jacquelyn Martin)

Facebook, Google Outline Unprecedented Mass Censorship at US Senate Hearing

The hearing was called to review what technology companies are doing to shut down the communications of oppositional political organizations.