Family members huddle at the fence to talk to loved ones living across the border. Kainaz Amaria/NPR hide caption

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Parts of the fence along the U.S.-Mexico border might stop vehicles, but they don't keep out those making the journey on foot. Kainaz Amaria/NPR hide caption

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Columbus, N.M., was raided by Pancho Villa in 1916 and by federal agents in 2011. Kainaz Amaria/NPR hide caption

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Workers arrive at an assembly plant located along the border. Kainaz Amaria/NPR hide caption

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Dob Cunningham (left) and his friend Larry Johnson look over the edge of Cunningham's 800-acre ranch in Quemado, Texas. Kainaz Amaria/NPR hide caption

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The La Posada Providencia shelter in San Benito, Texas, is run by a group of nuns. While the shelter is just across the border from Mexico, the asylum seekers come from poor, troubled countries around the globe. Kainaz Amaria/NPR hide caption

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Dob Cunningham (right) and his friend Larry Johnson stand on the edge of Cunningham's 800-acre ranch in Quemado, Texas, which touches the Rio Grande. On the other side, Mexico. Kainaz Amaria/NPR hide caption

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