Demand for Greenland. Why Trump (and not only him) wants the island

Greenland is more than 3,000 kilometres from Washington. But that doesn't bother Donald Trump to dream of having it. And openly, repeatedly, talk about it. The expansive ambitions of the president of the United States may surprise or outrage. But there are reasons that have already led Americans to make an offer to buy the island. It's not just what you see, it's what's under the ice.