North Korea announced it successfully test-fired long-range strategic cruise missiles into the sea on Sunday, overseen by leader Kim Jong Un. State media reported the drills were to test nuclear deterrence and combat readiness against external threats. South Korea confirmed the launches and stated its readiness to respond with the US. While UN resolutions ban ballistic missile tests, cruise missile launches are not prohibited, though they pose a maneuverable, low-altitude threat. This follows recent weapons development, including a nuclear-powered submarine.