The United States led a push at the UN Security Council Wednesday for tougher sanctions on North Korea, while warning the isolated regime's launch of an intercontinental ballistic missile had drastically narrowed the path for diplomacy. In a hard-hitting address to the council, US Ambassador Nikki Haley said Tuesday's ICBM test had made "the world a more dangerous place," and that Washington was ready to use force if need be to deal with the threat of a nuclear-armed Pyongyang.



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