Location, location, location: Greenland's position above the Arctic Circle makes the world's largest island a key part of security strategy.
Increasing international tensions, global warming and the changing world economy have put Greenland at the heart of the debate over global trade and security, and President Donald Trump wants to make sure his country controls the mineral-rich island that guards the Arctic and North Atlantic approaches to North America.
READ MORE: Trump again demands Greenland as NATO unveils military projects worth billions to prove its firepower
Trump's repeated demands for the territory and threats to take it by force have rattled the NATO alliance and discomfited European allies who have long relied on the U.S. as a partner in their defense.
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