Victims of South Korea's controversial adoption system search for answers - and birth mothers

South Korea used to be the world's largest source of babies for adoption. It's believed 200,000 children are part of the Korean adoptee diaspora, many of whom were sent away illegally and unethically. Those babies are now adults determined to trace their biological roots. Teresa Tang goes on an emotional journey with CNA's Lim Yun Suk. 

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