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Down on Border, 'La Linea' Isn't So Clear

NOGALES, Mexico -- Troops. Barricades. Guns. On the border, this is the vocabulary of U.S.-Mexico relations. Here at one of the busiest crossing points, dingy metal walls separate the United States from Mexico, rich from poor. The walls are spray-painted with crude images of American border patrol...
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By Manuel Roig-Franzia