Greenland: Who and what is defending it after Trump's threats to annex world's largest island?

Greenland, the world's largest island, is nine times larger than the UK, and if a missile crosses the Arctic – this is where the early warning starts. 

It's a strategic vantage point, but Arctic conditions demand specialist training to survive there. 

So, what's defending it? 

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Greenland is semi-autonomous and self-governing, but dependent on Denmark for its security. 

Denmark, one of the 12 founding members of Nato, varies the military presence on and around the island through regular deployments. 

In our video, BFBS Forces News takes an in-depth look at how Copenhagen defends Greenland and the Danes' Joint Arctic Command.