South Korea's nuclear envoy Lee Do Hoon told a senior U.S. diplomat on Tuesday that the "coming several weeks and months will be critical" in terms of laying the groundwork for the denuclearization of North Korea.The meeting in Seoul between Lee and Susan Thornton, acting U.S. assistant secretary of state for East Asian and Pacific affairs, came just days ahead of a planned summit between South and North Korea, to be followed by the first-ever U.S.-North Korea summit talks by early June.At the outset of the meeting, Lee and Thornton both welcomed the news that U.S. President Donald Trump's …READ FULL ARTICLE