Web giants cooperate on removal of extremist content

• A group effort? YouTube (GOOG, GOOGL), Facebook (NASDAQ:FB), Twitter (NYSE:TWTR) and Microsoft (NASDAQ:MSFT) are stepping up efforts to remove extremist content from their websites by creating a common database that will be up and running in early 2017.
• The web giants will share "hashes" - unique digital fingerprints they automatically assign to videos or photos - of terrorist material to enable their peers to identify the same content on their platforms.