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.
Special Series

The U.S.-Mexican Border: A Changing Frontier