U.S. Diplomat Is Residing in North Korean Capital, Chosun Says By Heejin Koo Nov. 26 (Bloomberg) -- A U.S. diplomat has been residing in North Korea since mid-November, acting as a liaison between the governments of Washington and Pyongyang, South Korea's Chosun Ilbo newspaper said, citing an unidentified official in Washington.The presence of the unidentified U.S. envoy, who is staying at the Koryo Hotel in Pyongyang, is an indication of improved relations between the two nations since North Korea pledged to disable its Yongbyon nuclear plant by the end of this year, the Seoul-based daily said. The U.S. plans...