Be My AI: When innovation and privacy clash

An AI-powered tool helped blind people make sense of the world - then ran into privacy concerns. Be My AI user, the BBC's Sean Dilley, in Washington DC, tells us what happened next. A rare interview with the boss of Spotfiy, Daniel Ek, who tells us there is a place for AI in music making. Plus, reporter Marc Cieslak tells us about second thumbs and brain hacking, as he explores the mind boggling world of neural interface technology.(Photo: A blind man using a mobile phone. Credit: Agrobacter/Getty Images)