North Korea conducts first "nuclear trigger" simulation drills, state media says. North Korea has conducted its first simulation drills to test its nuclear counterattack capabilities, referred to as the "nuclear trigger" system, under the guidance of leader Kim Jong Un. This exercise, which involved firing several short-range ballistic missiles into the sea and conducting artillery maneuvers with mock nuclear warheads, serves as a warning against perceived military threats from the US and South Korea. Kim Jong Un praised the effectiveness of the drills, highlighting the readiness of North Korea's tactical nuclear weapons.