"Most Sophisticated" smuggling Tunnel ever found at US-Mexico Border

An unfinished cross-border smuggling tunnel has been discovered at the US-Mexico border at San Luis, Arizona, and authorities are describing the structure as the longest ever to be discovered at the southern border.

Graphics of the passageway reveal its length. The tunnel extends 1,300 feet from San Luis Rio Colorado, Mexico, to San Luis, Arizona. Its terminus is located just yards away from a residential neighborhood on the American side of the border, although it’s likely the unfinished tunnel was meant to conclude within a residence controlled by smugglers within the United States.

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