Undocumented Migrants

As millions of rural poor move into Chinese cities, the country's legal residency system is making life difficult for the illegal rural migrants.

Census takers in New York City will face the tough challenge of tracking down people living in often illegally-built and hard to find small rooms and apartments.

When an immigration raid brought down the dominant employer in tiny Postville, Iowa, last year, nearly half of the town's population were either deported or lost their jobs. As the town struggles to regain its feet, its learned some tough lessons.

As a bargaining chip to encourage federal immigration reform, a religious group is calling on undocumented migrant workers to boycott the upcoming U.S. Census. Officials say such a boycott could hurt many cities.