The United States has become a major importer of sex slaves. Between 18,000 and 20,000 people are trafficked annually into the United States. How many of these are victims of sex traffickers? Kevin Bales, president of Free the Slaves, America's largest anti-slavery organization, says ... at least 10,000 a year. John Miller, the State Department's director of the Office to Monitor and Combat Trafficking in Persons, conceded: That figure could be low. What we know is that the number is huge." Bales estimates that there are 30,000 to 50,000 sex slaves in captivity in the United States at any given time. Sex-trafficking victims widely believe that if they talk, they or someone they love will be killed. And their fear is not unfounded. The trafficking rings reach back into the girls' hometowns, and local law enforcement is often complicit in the sex trade. In a series of excruciating conversations, Andrea explained to me how the trafficking ring that kept her worked. Girls were shuttled in open cars between the Plainfield, N.J., stash house and other locations in northern New Jersey. Andrea named trading hubs at highway rest stops in Deming, N.M.; Kingman, Ariz.; Boulder City, Nev.; and Glendale, Calif. The operating assumption among American police departments is that women who sell their bodies do so by choice, and undocumented foreign women who sell their bodies are not only prostitutes (that is, voluntary sex workers) but also trespassers on U.S. soil.