In a lengthy article for GQ Jason Kersten reports that “The Feds can’t see them. Or hear the digging. They don’t know how many there are or where they are headed. They know only that the tunnels are coming. And when they cross our border, when the soil gives way and the drugs start flowing, it’s already too late”:
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On a quiet night along the Tijuana border, you can almost hear them coming: the faint scraping of metal on dirt, falling clumps of earth, muted voices in the depths. At any given moment, there are men underground here, chipping their way toward the United States with antlike determination.
Many of the drug tunnels will be discovered and shut down before they’re operational, but it doesn’t matter; more will come. The economics are unassailable. A good tunnel can take nine months or more to build and cost up to $2 million, but if it can stay open for only a few hours, the cartels can move enough marijuana through it to satisfy entire time zones—making enough money to pay for twenty more tunnels.