U.S. President-elect Donald Trump says he wants to make Greenland a part of the United States and does not rule out using military or economic power to get Denmark to hand over the mineral-rich and strategically important island.

Pituffik Space Base, located in the far north of Greenland since the end of the second world war, is home to 200 US military personnel and 450 other forces and contractors from allies, part of Washington’s missile early warning system as well as offering space surveillance and satellite command.