3 things to know about Trump’s ‘Golden Dome’ and Greenland’s role in nuclear defense 

In a hypothetical nuclear war involving Russia, China and the United States, the island of Greenland would be in the middle of Armageddon.

The strategic importance of the Arctic territory — under the flight paths that nuclear-armed missiles from China and Russia could take on their way to incinerating targets in the United States, and vice versa — is one of the reasons U.S. President Donald Trump has cited in his disruptive campaign to wrest control of Greenland from Denmark, alarming Greenlanders and longtime allies in Europe alike.