https://www.cnet.com/news/facebook-google-testify-to-congress-over-white-nationalism-how-to-watch/

The hearing was prompted by the massacre in Christchurch, New Zealand, last month, in which a terrorist attacked two mosques, killing 50 people. What made the attack more shocking was that the shooter livestreamed the murders on Facebook, prompting people to download copies and spread them across the internet. The video's spread, and Facebook, Google and Twitter's seeming inability to stop it, raised questions about what these companies are doing to prepare and prevent these types of things from spreading on their services.

For its part, Facebook said it's banning white nationalist and white separatist content from its service after consulting civil rights groups. Both Facebook and Google say they've also hired thousands of people to respond to bad behavior on their services. The companies also say they've developed artificial intelligence tools to more easily identify these types of posts before they spread.