On September 3, at exactly noon local time, North Korea detonated its sixth nuclear device purportedly releasing 140 kilotons of TNT equivalent, according to a recent U.S. intelligence estimate, and almost ten times greater than the U.S. nuclear bomb dropped on Hiroshima in August 1945.Shortly after the detonation, which triggered an artificial magnitude 6.3 earthquake, North Korea claimed that it successfully tested a thermonuclear bomb design that can be fitted on the Hwasong-14/KN20 intercontinental-range ballistic missile (ICBM), which was first tested on July 4 and is likely capable of reaching the continental United States.While the test of a hydrogen...