https://www.cnbc.com/2019/03/19/rep-bennie-thompson-asks-tech-to-explain-mosque-shooting-video-spread.html

The House Homeland Security Committee chairman called on tech leaders Tuesday to explain how a violent video of Friday's New Zealand mosque shooting spread on their platforms.

Rep. Bennie Thompson, a Democrat from Mississippi, wrote to the CEOs of Facebook, Twitter, Microsoft and Google's YouTube to request a briefing in front of the committee on March 27. Thompson asked the leaders to explain how they handled the video's spread, which appeared to depict one of two mosque shootings in Christchurch, New Zealand, on Friday that killed at least 50 people.