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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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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