Despite U.S. laws, thousands still virtual slaves in America

The United States banned slavery on Dec. 6, 1865. Yet tens of thousands of foreign-born workers are held in involuntary servitude throughout the United States — and the U.S. government has been unable to stop it. America declared war on human trafficking nearly a decade ago, but still the scourge of involuntary servitude has spread from America's coasts into its heartland.