BERMAN: All right, new this morning, a U.S. citizen detained in North Korea, Tony Kim had been teaching at Pyongyang University of Science and Technology, taken into custody as he was getting ready to leave the country. Kim is the third American now being held by North Korea.</s>HARLOW: And all of this is happening as President Trump holds phone calls overnight with the president of China, and Japan's prime minister, Shinzo Abe, amid the escalating tension between the United States and North Korea. Also North Korea threatening to sink a U.S. aircraft carrier. CNN's senior international correspondent, Ivan Watson, is in Seoul for us. Before we get to the escalating tension, what more do we know, if anything, about why this additional American was not allowed to board his flight out of Pyongyang?</s>IVAN WATSON, CNN SENIOR INTERNATIONAL CORRESPONDENT: We don't have any charges yet that have been leveled against him. Most of the information coming from the Swedish Embassy in Pyongyang, Poppy, because it represents U.S. interest in North Korea since there are not direct relations between Pyongyang and Washington --
American Citizen Detained By North Korea.