Sarah is on holiday so the BBC's US Special Correspondent Katty Kay steps into her breach on Americast, equipped with stories of Dr Anthony Fauci saving a guest at the prestigious Gridiron dinner. The team speak to Marianne Williamson, who found fame as Oprah Winfrey's 'spiritual advisor', and...

Twitter insiders have told the BBC that the company is now much less able to protect users from trolling, state-co-ordinated disinformation and child sexual exploitation. Marianna takes the rest of the Americast team though her BBC Panorama investigation into how one of the world’s most...