On Sunday, Mexican police found 49 mutilated bodies, believed by some to be migrants, on a road that connects the industrial city of Monterrey with the United States border.

Christian youth are standing up to the drug trafficking violence in Ciudad Juarez, Mexico's most violent city -- where 5,000 people were murdered in the last two years, caught up in narco wars.

More than 47,000 people have been killed in drug violence in the five years since President Felipe Calderon launched a military crackdown against drug cartels.

In Oaxaca, 18 percent of its 3.7 million people have left for other parts of Mexico, and especially for the United States. Almost half its towns have shrunk, and migration has become part of the daily experience for almost every family.

When it was established in the late nineteenth century, Labor Day was intended to honor the American working man. Yet a great deal of our menial labor today is performed not by American citizens but by undocumented migrant workers—many of whom risk their lives in thousand-mile journeys simply to get to the United States

Tens of thousands of well-off Mexicans have moved north of the border in a quiet exodus over the past few years, according to local officials, border experts and demographers. Unlike the much larger population of illegal immigrants, they are being warmly welcomed.