Trump and Putin's First Meeting

This year's G20 summit of world leaders has opened in the German city of Hamburg. The key encounter will be the first official meeting between President Trump and the Russian leader, Vladimir Putin. So what's the best way to prepare for and handle a meeting with President Putin?

Also on the programme: Raped teenager in El Salvador sentenced to 30 years in prison for the murder of her stillborn baby; and how do you explain the physics of quarks?

(Image: Donald Trump (left) and Vladimir Putin (right). Credit: Reuters/Carlos Barria)