Donald Trump’s renewed talk of seizing Greenland—once dismissed as bluster—is now being taken seriously after the “gunboat diplomacy” in Venezuela. Because Greenland is part of Denmark, a NATO member, any U.S. attempt to annex or coerce it would amount to an attack on an ally and could effectively collapse NATO. European leaders are pushing back forcefully, framing the issue as a test of whether postwar norms, alliance commitments, and international law still restrain great-power ambition.(Shane Harris, Isaac Stanley-Becker, Jonathan Lemire via The Atlantic)