They call the children who spy on Border Patrol agents halcones, or hawks.
Hired by groups smuggling people into the U.S., the binocular-wielding informants camp out in aging bungalows on the Mexican side of the Rio Grande. They track the movements of the agents.
When the agents aren’t around, immigrants take on the 18-foot fences along the border with bolt cutters or homemade rope ladders attached to grappling hooks. Or they muscle their way up the web-patterned barriers, using screwdrivers as handholds.