we have two views: robert carlin had a 31-year career at the c.i.a. and state department focused on korea. he's the co-author of the new edition of the book, "the two koreas: a contemporary history." and sung-yoon lee, an assistant professor of korean studies at tufts university's fletcher school. welcome to both of you, to the newshour, robert carlin, let me begin with you. how surprising is this? >> surprising, i was not surprised that jang fell from power. i had thought for some time that was going to happen-- . >> woodruff: why did you think it would? >> because he's been up and down in the leadership before. because he's very ambitious, a little bit cocky, and the sort of figure who you don't want too high up in the north korean leadership. a little bit dangerous. he had a lot of enemies. he made enemies. he had some friends but he also had a lot of enemies and he was very vulnerable. so it was only a matter of time. whether or not it would be this theatrical was the question. >> woodruff: professor lee, just a matter of time? >> yes, indeed. in