Many comments trying to explain the US contribution are distracted by Twitter. That was just a show backing up bigger moves. The US started targeting specific R

Many comments trying to explain the US contribution are distracted by Twitter. That was just a show backing up bigger moves. The US started targeting specific Russian and Chinese smugglers who have been allowing the North Korean nobility to skirt the general sanctions for decades. https://www.washingtonpost.com/world/national-security/us-sanctions-chinese-and-russian-companies-and-individuals-for-conducting-business-with-north-korea/2017/08/22/78992312-8743-11e7-961d-2f373b3977ee_story.html https://www.washingtonpost.com/world/national-security/us-sa... Previous administrations avoided taking this extra step, due to realpolitik cargo cult fears about souring Russia/China and retaliation from a desperate and truly cut off North Korean elite. President Trump decided to call their bluff.