Why has America's interest in Greenland increased from a defense perspective?

America's long-standing defense interest in Greenland has been reinforced due to several strategic concerns. Primary among these is the critical Giuk Gap, which has become increasingly important in the modern digital world. Two critically important underwater high-speed internet cables pass by Greenland - one providing the quickest connection between Japan and Europe, and another (the Leif Erikson cable) connecting Canada and Scandinavia. These cables are vital for global connectivity and vulnerable to potential sabotage by Russian submarines, which could briefly paralyze US military forces in Europe during a conflict. Additionally, Greenland's extensive, largely uninhabited 27,000-mile coastline presents significant monitoring challenges.