At the United Nations General Assembly, Donald Trump signed a trilateral security agreement with Denmark and Greenland, authorizing two new American military bases on the island and broad US freedom of movement across its territory. The accord arrives as melting Arctic ice transforms a once-remote frontier into a theater of intensifying geopolitical competition, where new shipping lanes and vast untapped resources have drawn the ambitions of great powers. After months of public pressure and quiet diplomacy that strained transatlantic relations, the agreement attempts to reconcile American stra