Karel has been back in the Czech Republic for several years now, but when agents swept up illegal workers at 60 Wal-Marts across the U.S. last month, the news brought him straight back to Dothan, Alabama. That's where Karel, now 28, spent 15 months as an illegal worker cleaning one of the chain's outlets: working 10 to 12 hours a day, seven days a week, for $5 per hour, constantly fearing deportation and being robbed of two months' wages by two Czechs who arranged the work and handled all payments. "It was do your work and shut up," he says. "There...
