The border fence behind Manuel Zamora’s home suggests strength and protection, its steel poles perfectly aligned just beyond the winding Rio Grande. But every night, the crossers come. After dark and at sunup, too, dozens of immigrants scale the wall or walk around it, their arrival announced by the angry yelps of backyard dogs.

“Look,” Mr. Zamora said early one recent morning, “here they come now.” He pointed toward his neighbor’s yard, where a young man in a dark sweatshirt and white sneakers sprinted toward the road, his breath visible in the winter dawn. Three others followed, rushing into a white sedan that arrived at the exact moment their feet hit the pavement.

via Border Security – Hard to Achieve, and Harder to Measure – NYTimes.com.