U.S. President Donald Trump and South Korean President Moon Jae In have affirmed close coordination to ensure that Trump and North Korean leader Kim Jong Un will agree in a planned meeting to concrete measures to denuclearize the North, the South's presidential office said Sunday.During telephone talks Saturday, Trump and Moon agreed to step up cooperation to swiftly realize what will be the first-ever U.S.-North Korea summit and exchanged views over candidate sites for the event, it said.Speaking at a rally in Michigan on Saturday, Trump said he expects to meet with Kim "over the next thre…READ FULL ARTICLE