North Korea said Monday it conducted a ballistic missile launch drill the previous day that simulated a tactical nuclear counterattack, with the missile detonating 800 meters above the Sea of Japan.The projectile, likely the single short-range ballistic missile detected by Japan and South Korea on Sunday morning, was equipped with a mock nuclear warhead, the official Korean Central News Agency said.The missile test came amid the United States and South Korea conducting a joint military exercise dubbed "Freedom Shield," their first large-scale springtime joint drill in five years. The exerci…READ FULL ARTICLE