Kim oversees North Korea submarine missile testsbr br North Korean leader Kim Jong Un oversaw the testing of new submarine-launched cruise missiles and assessed progress on developing a nuclear-powered submarine, emphasizing his aim to establish a nuclear-armed navy to counter perceived external threats. The announcement follows South Korea's detection of multiple cruise missile firings near a key North Korean shipyard, marking the latest in a series of weapons demonstrations amid heightened tensions with the United States, South Korea, and Japan.