A new official trailer from Tom Clancy’s Rainbow Six Siege shows off the new "operator" system in Ubisoft's upcoming continuation of the tactical shooter series. Word is: "Today, Ubisoft announced that Tom Clancy’s Rainbow Six Siege will include a brand-new operator system. Operators are specialists from the world’s top Special Forces units and masters in their respective fields. Each has their own unique expertise which adds a new tactical layer to the Siege experience and pushes team play even further. Players will put together these operators to create their best CTU (counter-terrorism unit) composition and defeat the opposing team." Those interested in a closer look at this system may be interested in a livestream on Twitch today at 2:00 pm EDT.