Mauritania's endless sea of sand dunes hides an open secret: An estimated 10% to 20% of the population lives in slavery. But as one woman's journey shows, the first step toward freedom is realizing you are enslaved. An estimated 10% to 20% of Mauritania's 3.4 million people are enslaved — in “real slavery,” according to the United Nations' special rapporteur on contemporary forms of slavery, Gulnara Shahinian. If that's not unbelievable enough, consider that Mauritania was the last country in the world to abolish slavery. That happened in 1981, nearly 120 years after Abraham Lincoln issued the ...