04/16/2018 Los Angeles Times
In the high desert east of this border town, the rolling hills topped with mesquite and paloverde trees are a picture of rugged desolation.
But there are flashes of movement: Darting between bushes are five migrants who just crossed into Arizona, not far from a road where they could hop into a car to continue their journey.
Not one U.S. Border Patrol agent is within sight. But the group is about to be spotted anyway, and their entry thwarted.
From a hilltop tower miles away, a camera scans miles of terrain — providing a clear view for an agent sitting in front of a computer monitor in a darkened control room.