https://www.bbc.com/news/world-asia-40269546
https://time.com/5060144/north-korea-political-prisons/
https://www.usatoday.com/story/news/world/2018/05/25/north-korea-defector-kang-cholhwan-life-prison-camp/622760002/
https://en.wikipedia.org/wiki/List_of_foreign_nationals_detained_in_North_Korea
https://www.bbc.com/news/world-asia-40271202
https://www.gq.com/story/otto-warmbier-north-korea-american-hostage-true-story
https://www.usatoday.com/story/news/world/2018/05/25/north-korea-defector-kang-cholhwan-life-prison-camp/622760002/
https://torontolife.com/city/life/spent-919-days-north-korean-prison/
https://www.youtube.com/watch?list=PLXhuzKSXJ9OQ1SUX4jDLOa7dQP65h7tai&v=JF4R6wwA4C4&feature=emb_title