Inside the cat-and-mouse game between smugglers, migrants and law enforcement on the Southern border. Image: CBP / Jerry GlaserA pale yellow gate stands 4 feet high on a bridge over a rural Arizona irrigation ditch. The nondescript structure epitomizes the challenges of securing the southern border. Border agents discovered that smugglers were transporting drugs, and perhaps people, across the tiny bridge. After the gate went up, traffic paused until the smugglers figured out they could slip under the poles in a go-kart.

Source: Wall Street Journal May 21, 2019 23:00 UTC