US and South Korea strengthen alliance with new nuclear deterrence plan.

President Joe Biden and South Korea's Yoon Suk Yeol unveiled a new plan to counter North Korea’s nuclear threat, with the U.S. leader issuing a blunt warning that such an attack would “result in the end of whatever regime” took such action. The new nuclear deterrence effort calls for periodically docking U.S. nuclear-armed submarines in South Korea for the first time in decades, bolstering training between the two countries, and more. The agreement also calls for the U.S. and South Korean militaries to strengthen joint training and better integrate South Korean military assets into the joint strategic deterrence effort.