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An estimated 10 percent of Mexico's citizens live in the United States, without legal documents.
Learn more about illegal border crossings, the battle over NAFTA and the changing face of immigration.
Video Length: 19:17
Follow FRONTLINE/World reporter Claudine LoMonaco as she retraces the tragic journey of Matias Garcia, a chili pepper farmer from a small Zapotec Indian village in the state of Oaxaca, Mexico, who crossed the border looking for work and died in the Arizona desert. LoMonaco and producer/reporter Mary Spicuzza find Garcia's family and interview his surviving brother and others. Their responses to LoMonaco reveal the dangers faced by desperate migrants. watch video >> read more >>
Essential Backgrounders from The New York
Times Read New York Times reporter Timothy Egan's in-depth analysis of the most dangerous border crossings, watch a slideshow about children smuggled across the border, travel on a voyage through Guatemala with migrants hoping to reach the U.S., and explore the perilous routes across the border in an interactive feature.