Trump's Greenland comments unsettle Europe

At the World Economic Forum in Davos, Europe's most senior politicians grapple with a transatlantic crisis and a US president speaking to them in a way they have never known before. Can the UK's 'gentle' approach still work?

Also on the programme: The Ugandan singer-turned-opposition leader Bobi Wine gives his first post-election interview to the BBC in hiding; and an Austrian cow that uses a tool, held in its mouth, to scratch its back.

(Photo: European Commission President Ursula von der Layen speaks during the 56th annual World Economic Forum (WEF) meeting in Davos. Credit: Reuters)