TIME spoke to legal experts about whether Trump could legally pull the U.S. out of NATO and the wider implications.

As Trump calls for a U.S. takeover of Greenland, NATO's future hangs in the balance. Here are 15 claims about the security alliance.

U.S. NATO ambassador Matthew Whitaker defends American focus on Greenland amid European backlash, calling Arctic security crucial for continental defense.

Prime Minister Mark Carney is considering sending soldiers to Greenland for military exercises with NATO allies, as U.S. President Donald Trump threatens tariffs on European nations unless they let him purchase and control the semiautonomous island,

Several NATO countries are deploying small numbers of military personnel to Greenland to participate in joint exercises with Denmark as US President Donald Trump ramps up his threats to forcibly annex the Arctic island.

Britain is discussing with NATO allies how to enhance Arctic security against Russia and China. Transport Secretary Heidi Alexander said Sunday that these talks are routine and not a response to U.S.

AMERICA’S HUNGER for Greenland is setting off an explosive row within NATO.  President Donald Trump, infuriated by European allies’ resistance to his effort to annex the autonomous Danish territory, said on January 17th that he would impose 10% tariffs on imports from eight European countries that had sent troops there two days earlier.

"The Russian people are increasingly feeling the effects of the Kremlin's continued prioritization of the Russian defense industrial base."