The United States "can't be overly optimistic" about the outcome of a planned meeting between President Donald Trump and North Korean leader Kim Jong Un, Adm. Harry Harris, commander of the U.S. Pacific Command, said Thursday.With Kim reportedly committed to denuclearization, Harris said at a Senate hearing that Washington will continue to pursue a complete, verifiable and irreversible denuclearization of the Korean Peninsula.Referring to the planned summit which Kim proposed and Trump agreed to hold by the end of May, Harris said, "As we go into this, I think we can't be overly optimistic …READ FULL ARTICLE