Is Greenland for Sale?

US president Donald Trump says he wants the US to take over Greenland. The country is part of the Kingdom of Denmark, and Mr Trump says Denmark should 'give it up' for the defence of the free world. Many people think it will never happen. But could it? If so, how?

This programme details what Mr Trump has said and gauges the reaction in Greenland and Denmark, asking why the US might want greater control over Greenland and how likely it is to happen.