country. let s talk with paula hancocks in seoul, south korea. how is south korea now reacting to the escalating tensions and news of a detained american? reporter: well, anna, they re certainly watching this closely considering they also have a citizen who is still being held in north korea. this is not the first time for an american to be detained in the country. what we know about this particular man, a very popular surname of kim in korea, we know that he was detained as he was try to board a plane in pyongyang. we know he was a professor at the pyongyang university of science and technology. that particular group has brought out a statement saying they re unaware of what exactly this man is alleged to have done, but they do know that it was not related to the university itself. as i say, there s also a south korean who s a naturalized u.s. citizen, who was taken back in 2015. he was accused of espionage,