North Korean leader Kim Jong Un has overseen the nation's first combined tactical exercise, which simulated a nuclear counterattack and involved super-large multiple rocket units, the official Korean Central News Agency said Tuesday.The report on Monday's drill came after Japan and South Korea detected the launch of at least one ballistic missile from Pyongyang toward the Sea of Japan. The exercise was a "clear warning signal to the enemies," KCNA said in reference to South Korea and the United States, which have been conducting joint military exercises since April 12.The super-large multip…READ FULL ARTICLE