United States Supreme Court
Social media companies did not knowingly provide substantial assistance to ISIS, and thus are not liable for aiding and abetting an act of international terrorism under the Anti-Terrorism Act.
Twitter, Inc. v. Taamneh held that allegations that social media platforms hosted ISIS content and failed to remove it did not establish that the companies knowingly and substantially assisted a specific act of terrorism, defeating aiding and abetting liability under federal antiterrorism law.