North Korea has conducted a firepower demonstration of various weapons systems including drones, cruise missiles and multiple rocket launchers at an exhibition on unmanned aerial technology, with leader Kim Jong Un calling for a rapid expansion of drone technology, state-run media said Friday.At Thursday's event, Kim said it is "an indispensable option" to aim to seize "absolute superiority" in drone technology amid the "ever-changing patterns of modern warfare," the official Korean Central News Agency said."Strength precisely means peace and peace is guaranteed only by strength," he said, …READ FULL ARTICLE