WASHINGTON (Reuters) - North Korea s ambassador to the United Nations on Friday ignored a U.S. call for a cessation of weapons testing to allow for talks with Pyongyang on its nuclear program and said his country would not pose a threat to any state, as long as its interests were not infringed upon. U.S. Secretary of State Rex Tillerson earlier told a meeting of the U.N Security Council on Pyongyang s nuclear and ballistic missile programs that a  sustained cessation of North Korea s threatening behavior  was needed before talks could occur between Washington and Pyongyang. North Korea s U.N. ambassador, Ja Song Nam, made no mention of Tillerson s call in his speech to the session, which he called  a desperate measure plotted by the U.S. being terrified by the incredible might of our Republic that has successfully achieved the great historic cause of completing the state nuclear force.   