U.S. special envoy to North Korea Sung Kim stressed in a meeting on Tuesday with his Chinese counterpart the importance of responding "firmly" to North Korea's ballistic missile tests, calling them "increasingly escalatory actions," the State Department said.The talks took place in Washington as the United States pursues a new U.N. Security Council resolution against North Korea following its test-firing of an intercontinental ballistic missile on March 24, the first such launch by Pyongyang since November 2017.Winning support from China, a key ally of Pyongyang and a veto-wielding permanen…READ FULL ARTICLE