The Senate Committee on the Judiciary, Subcommittee on Crime and Terrorism hearing entitled: “Extremist Content and Russian Disinformation Online: Working with Tech to Find Solutions” October 31, 2017. This link includes video of the testimony as well as transcripts of prepared testimony by Facebook, Twitter, Google as well as two subject matter experts.

View the video of more than 3 hours of testimony, via C-SPAN

• The Washington Post: “Tuesday’s hearing by a Senate judiciary subcommittee comes a day after the prepared testimonies of Facebook and Twitter revealed that the reach of the Russian-connected disinformation campaign on their platforms was much larger than initially reported. As many as 126 million Facebook users may have seen content produced and circulated by Russian operatives. Twitter said it had discovered that 2,752 accounts controlled by Russians, and more than 36,000 Russian bots tweeted 1.4 million times during the election. And Google disclosed for the first time that it had found 1,108 videos with 43 hours of content related to the Russian effort on YouTube. It also found $4,700 worth of Russian search and display ads…”
• TechCrunch: Russian-backed content may have reached 126 million on Facebook
• Google Blog Post – Security and disinformation in the U.S. 2016 election: “We have been conducting a thorough investigation related to the U.S. election across our products drawing on the work of our information security team, research into misinformation campaigns from our teams, and leads provided by other companies. Today, we are sharing results from that investigation. While we have found only limited activity on our services, we will continue to work to prevent all of it, because there is no amount of interference that is acceptable…”
• Facebook’s 2016 Election Team Gave Advertisers A Blueprint To A Divided US