US and China battle over tech

In a week of rising tension between US and China over trade we hear how some of China's biggest tech firms are caught in the cross-fire. And Rory Cellan-Jones asks why Apple has decided to take down a Hong Kong mapping app? As Ada Lovelace Day spreads around the world to celebrate women in science and tech, the BBC's Zoe Kleinman asks its founder whether conditions have actually improved since the movement was first launched a decade ago? And Rory asks UNICEF why it is getting into the controversial world of cryptocurrency? Rory is joined by technology writer Jamillah Knowles and by Mark Ward from the BBC tech desk(Picture:A woman holds her mobile phone as a group of masked protesters run past in the Diamond Hill station in the Kowloon district of Hong Kong on October 7, 2019. CREDIT: PHILIP FONG/AFP via Getty Images)