Christchurch mosque shootings

Following the attack, which was livestreamed on Facebook, the social network teams up with the Metropolitan Police of London. Facebook is providing bodycams to the force's firearms officers to help train its artificial intelligence systems, enabling it to automatically detect and remove live first-person footage of violent incidents. The company says it previously had insufficient footage for its software to suitably match fresh footage with, and has been criticised for its role in the shooting. Instagram say they will also participate.