[Editorial] New weight of N. Korea’s nuclear threats makes dialogue all the more urgentNorth Korea conducted its first-ever counterattack drill with simulated nuclear warheads on 600 mm super-large multiple rocket launchers as part of its “Nuclear Trigger” system for comprehensive nuclear weapon management, the Rodong Sinmun newspaper reported. Coming in response to a joint South Korea-US aerial infiltration exercise reminiscent of a “decapitation drill,” the exercise amounted to the North answering with an overt nuclear threat.