for example how it functioned in the rest of the world, but at the same time some of the students really thought that people spoke korean in the rest of the world. the utter lack of information was astounding. >> was there knowledge about the outside world all wrong in terms of propaganda or did they just learn nothing? >> it was all like a mismatch. you know, they didn't know the existence of the internet in 2011, and this was a pyongyang university of science and technology. their major was computer a lot of them, but they thought internet, it's just north korea's -- it's like predownloaded information system. they thought that was the internet. >> how did you get the notes out? that itself is a story. >> i wrote morning and night and i had a laptop with me since i was a teacher, or posing as a teacher. but then i would write all this