https://www.cnbc.com/2017/09/28/facebook-google-twitter-asked-to-testify-on-russian-meddling.html

Executives from Facebook, Alphabet's Google and Twitter have been asked to testify before the U.S. Congress in coming weeks as lawmakers probe Russia's alleged interference in the 2016 U.S. election, committee sources said on Wednesday.

A Senate aide said executives from the three firms had been asked by the Senate Intelligence Committee to appear at a public hearing on Nov. 1.