Thousands attended protest organized by Russians on Facebook

Thousands attended protest organized by Russians on Facebook  The Hill Facebook, Google and Twitter are set to testify on Capitol Hill. Here's what to expect.  Washington Post Facebook plans to tell Congress that 126 million Americans may have seen Russia-linked ads  Los Angeles Times What to Watch for as Facebook, Twitter and Google Executives Testify on Capitol Hill  New York Times Putin's Pro-Trump Trolls Just Targeted Hillary Clinton and Robert Mueller  Mother JonesFull coverage