Predictably, the Wall Street Journal’s editorial page has declared, “North Korea’s test shows the continuing failure of arms control.” The Comprehensive Test Ban Treaty has 183 signatories and 164 ratifications. It sets a global norm against testing nuclear devices that defines violators as outlaws. Only one country has violated this Treaty since 1998. The Organization created to prepare for the Treaty’s entry into force has established an international monitoring network consisting on 282 certified stations employing various technologies, situated in 80 countries, including all permanent members of the UN Security Council. If this constitutes failure by the Journal’s editorial standards, then success requires perfection.