U.S. military activity in Europe has intensified after reports that Donald Trump has authorised nuclear force exercises in response to Russian provocations. A flight of B-2A “Spirit” stealth bombers has been tracked crossing the Atlantic towards Europe, signalling a show of strength. At the same time, nuclear strike exercises are underway in France, adding to the sense of heightened readiness across NATO allies. These coordinated drills highlight the growing strain between Washington, Moscow and