In a move that reshapes the long-standing balance of Arctic sovereignty, President Trump announced Friday that the United States has secured what he calls permanent security control over Greenland through an agreement with Denmark — a nation that has held stewardship over the autonomous island for centuries. The Arctic, long a quiet frontier, has become a theater of great-power ambition as melting ice opens new routes and reveals vast resources, making Greenland's strategic position ever more consequential. This agreement signals not merely a bilateral arrangement, but a reordering of how the