A modern tale of slavery, survival, and escape In 1986, 7-year-old Francis Bok was taken from his village in southern Sudan by raiding Arab militiamen from the north and forced into slave labor, along with hundreds of other Dinka women and children. His parents were murdered. Escaping when he was 17, Mr. Bok made his way to Cairo where, with help from other Dinka refugees, he secured UN refugee status and eventually an airplane ticket to the United States. Since 1986, nearly 2 million southern Sudanese - black Africans who are mostly Christian or followers of local religions - have...