North Korea's ambassador to the United Nations had problems renewing his visa, which was delayed for nearly two months beyond its expiry, according to a diplomatic source familiar with U.S.-North Korea ties.Ja Song Nam, who has served as ambassador to the United Nations since Feb. 28, 2014, applied to extend his visa in March, before it expired on May 22, the source said.However, the renewal was only granted after North Korea raised the issue on July 13 at a closed meeting of a U.N. committee dealing with the host country.As the host, the United States is charged with issuing visas and rene…READ FULL ARTICLE