Most Americans are shocked to discover that slavery still exists in the United States. Yet 145 years after the Emancipation Proclamation, the CIA estimates that 14,500 to17,000 foreigners are "trafficked" annually into the United States, threatened with violence, and forced to work against their will. Modern people unanimously agree that slavery is abhorrent. How, then, can it be making a reappearance on American soil? Award-winning journalist John...