"North Korea Tests Underwater Nuclear Attack Drone in Response to Naval Drills"

North Korea conducted a test of its underwater nuclear weapon system in response to joint military exercises by the United States, Japan, and South Korea, citing them as a serious threat to its security. The system, named "Haeil 5-23," was developed in the East Sea and its testing is seen as a countermeasure to the perceived threat. This comes after North Korea's previous test-firing of intercontinental ballistic missiles, which were condemned as a violation of U.N. Security Council resolutions.