Huge US Gun-control Rallies

Mass student-led protests, under the banner March For Our Lives, call for tighter gun control across the US in the wake of Parkland school shooting.

Also in the programme: France honours 'hero' police officer who was killed after swapping with hostage; and the philosophical questions behind driverless car technology.

(Photo: Hundreds of thousands attend March For Our Lives in Washington DC. Credit: Getty Images)