Elon Musk becomes world's first trillionaire after SpaceX stock market debut

Elon Musk's satellite, AI and rocket company, SpaceX, has enjoyed a successful first day on the Nasdaq stock exchange, reaching a value of $2.2 trillion. Can the valuation be justified? We ask economist Dr Mohamed El-Erian.

Also on the programme: Sir Grayson Perry responds to news of the death of fellow artist David Hockney at the age of 88. And we report from Scotland, where football fans are preparing to watch their men’s team return to the World Cup after a 28 year absence.