France Tests Upgraded M51.3 Nuclear Missile from Submarine

France test-fired an upgraded M51.3 nuclear-capable ballistic missile from a submarine off Brittany, without a live warhead, following its pledge to expand its nuclear arsenal amid Russia tensions. The test, announced Tuesday, was conducted from the Le Vigilant submarine. President Emmanuel Macron called it a demonstration of deterrence credibility, marking the first planned increase in France's nuclear weapons in decades. France holds the world's fourth-largest nuclear arsenal with about 290 warheads, making it the EU's sole nuclear power and one of three NATO members with such weapons.