SEOUL, South Korea — North Korean leader Kim Jong Un supervised a live-fire drill of nuclear-capable “super-large” multiple rocket launchers designed to target South Korea’s capital as he vowed to strengthen his war deterrent in the face of deepening confrontations with rivals, state media said Tuesday.North Korean leader Kim Jong Un observing the Western Region Artillery Unit’s ultra-large rocket salvo firing drill, at an unconfirmed location in North Korea on March 18, 2024.KCNA / AFP – Getty ImagesThe report came a day after South Korea and Japan said they detected North Korea…