https://www.siliconvalley.com/2019/09/24/sheryl-sandberg-outlines-silicon-valleys-plan-to-fight-online-extremism/

Some of Silicon Valley’s biggest companies announced Monday that they’re revamping an organization they established to fight online extremism in order to allow it to work more extensively with outside parties.

The announcement, which came on the sidelines of the United Nations General Assembly in New York, comes six months after the suspect in the New Zealand mosque shooting streamed the massacre live on Facebook. At least three atrocities in 2019 have involved suspects posting hate-filled messages on online forums in advance of an attack, including August’s shooting at a Walmart in El Paso, Texas.