Assignment - Korea's People Smugglers
Lucy Williamson reports from South Korea on the shadowy world of the brokers who help people to escape from North Korea.
Defecting from North Korea is a dangerous business.
It comes at a high price and there's no guarantee of success.
Many make the journey to South Korea with the help of brokers - individuals and organisations who smuggle people along the illegal overland route known as the "Underground Railroad".
For Assignment, Lucy Williamson meets some of the brokers in Seoul who make a living helping people escape North Korea.