south korea

In a historic summit more striking for its extraordinary images than its substance, North Korean leader Kim Jong Un and South Korean President Moon Jae-in set aside a year that saw them seemingly on the verge of war, grasped hands and strode together Friday across the cracked concrete marking the Koreas' border.

Nearly a month after conducting underground nuclear tests, the North Korean government threatened Thursday to launch a preemptive nuclear strike on the United States and other perceived aggressors.