"For purposes of National Security and Freedom throughout the World, the United States of America feels that the ownership and control of Greenland is an absolute necessity," Trump wrote on Truth Social.

Can a country legally buy another country? What’s the argument for trying to buy it? And, is the rationale rooted in reality?

Greenlanders said they should make their own choice about the island's future, following U.S. President-elect Donald Trump's proposal to buy the vast Arctic island that has been a territory of Denmark for centuries.