State media in North Korea reported on Friday that ruler Kim Jong Un had supervised a weapons exercise the previous day in which a volley of missiles was fired from rocket launchers. This was intended as a show of force against South Korea, the reports said, and had used a launch control system which is part of the “state management system for nuclear weapons.” North Korea claims to have missiles equipped with tactical nuclear warheads that can be fired from multiple rocket launchers to hit targets throughout South Korea. The exercise was also said to demonstrate North Korea’s ability to launc…