The United States and South Korea conducted a joint aerial drill with a B-1B bomber, carrying out precision-guided bombing exercises for the first time in seven years. The drill involved the dropping of Joint Direct Attack Munitions (JDAMs), including bunker-busters, which are designed to neutralize underground targets. The exercise is seen as a show of force against North Korea, which has recently escalated tensions by launching balloons carrying trash across the border. North Korea is known to be sensitive to drills involving bunker-buster bombs, considering them a threat to its leadership.