Tech Tent

We follow Indian cyber police in the city of Kolkata as they raid a call centre suspected of scamming people in the US and UK. Plus, Facebook's Mark Zuckerberg defends the Libra digital currency project. And how robots could help more patients in India's hospitals receive the surgery they need. Presented by Rory Cellan-Jones, with BBC reporter Szu Ping Chan, and special guest Izabella Kaminska from the Financial Times.(Image: Stock photo of a man entering banking details into his computer, Credit: iStock/ Getty Images Plus).