"North Korea's Underwater Nuclear Drone Test Raises Tensions"

North Korea claims to have tested an "underwater nuclear weapons system" in response to joint military drills by the United States, South Korea, and Japan, stating that the tests are necessary to counter the perceived threat to its security. The country has been increasingly aggressive in its rhetoric and actions, including claiming to have fired a medium-range missile with a hypersonic warhead. Analysts are uncertain about the readiness of North Korea's underwater system, but the regime continues to assert its military capabilities and condemn the joint military exercises as hostile acts.