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In October 2006, Oprah was reading The New York Times when she saw a picture of a 6-year-old child slave named Mark. For months, she was haunted by the look in Mark's eyes, so Oprah decided to send Oprah Show correspondent Lisa Ling on a 7,000-mile journey to Ghana to find him.
When Lisa first got the assignment, she was shocked to learn the statistics about child slavery in the West African country —which is roughly the size of Oregon. It is estimated that one in every four children in Ghana work as child laborers, Lisa says.