Twitter tweaks Trump’s tweets

US President Donald Trump signs an order that could strip social media firms of legal protections after Twitter adds warnings to his tweets. Plus, despite predictions, artificial intelligence has not replaced radiologists. We find out why humans plus AI are seen as more effective in cancer screening than software alone. And will the Covid-19 pandemic give online learning a boost as schools and universities consider a “socially-distanced” future? Presented by Rory Cellan-Jones, with BBC tech reporter Jane Wakefield. Produced by Jat Gill. (Image: Donald Trump in the Oval Office as he signs an order aimed at social media companies, Credit: Jonathan Ernst/ Reuters).