What next for Twitter now Elon Musk is on board?

This week, Tech Tent speaks to Professor Brooke Erin Duffy about what Elon Musk investing in Twitter could mean for the social platform. The curator of TED, Chris Anderson, gives details about the return of the conference in person. And Kay Wackwitz, from Drone Industry Insights, considers a major expansion of deliveries by unmanned aircraft in the US.