Lee Seo-hyun grew up as a proud North Korean elite, always thinking about what she could do to help make her country a better place. That was until she saw North Korean agents abruptly take her best friend and roommate Su-jeong away from their school dormitory in Beijing in December 2013. A text message from Su-jeong that she would not be able to come back and that she was throwing away her phone at a highway rest st...