US electric car maker Tesla doubles down on its ambitions by unveiling a battery-powered Semi-truck and a new Roadster 2 sports car. Plus, James Chappell of security firm Digital Shadows shows us evidence of a dark web industry dedicated to creating and spreading "fake news". And should users of Apple's new iPhone X be concerned about claims that its facial recognition system can be fooled by a mask? We ask James Lyne, Global Head of Security Research at Sophos. Presented by Rory Cellan-Jones, with BBC technology reporter Zoe Kleinman, and special guest Rhiannon Williams, technology correspondent at the i newspaper. (Image: Tesla CEO Elon Musk unveils the Roadster 2 in California, Credit: Reuters).