The U.S.-Mexican Border: A Changing Frontier The border emphasizes how much the U.S. and Mexico rely on each other, and, like siblings, it also illustrates the tension between them. As the U.S. builds new fences and heightens patrols, a drug war on the Mexican side has killed thousands of people this year alone. Meanwhile, trade across the border continues to grow.

Fence Affects Border Town Culture, Relationships

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Economy, Drug Wars Hurt Cross-Border Business

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Agents Use High- And Low-Tech Tracking At Border

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Deported Immigrants Struggle To Re-Enter U.S.

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Drug Deaths, Violence Plague Border In Tijuana

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