Tuesday 30 May

Tensions rise in east Asia as large-scale military drills kick off near South Korea’s Jeju Island. Also in the programme: Nato’s secretary general, Jens Stoltenberg, visits Oslo and South American leaders meet in Brasília to discuss relaunching the UNASUR bloc. Plus: food made using recycled breath could soon be on the menu for astronauts. See omnystudio.com/listener for privacy information.