Social media sites are facing backlash after failing to contain the spread of a video of an attack on two New Zealand mosques. The shootings at the two Christchurch mosques left 49 people dead and injured dozens more. The man who allegedly carried out the shootings reportedly broadcast 17 minutes of the attack on a Facebook livestream. Both YouTube owner Google and Twitter also say they're working to remove video of the shootings from their sites. Officials are criticizing the tech giants once again for reacting too slowly to harmful content. Legal analysts say sharing the video will only inspire more mass shootings in the future.