Border Drug Tunnels Put Warehouses Under Scrutiny

SAN DIEGO — Workers at warehouses just feet from the U.S-Mexico border would come and go at odd hours. Few, if any, knew what their trucks carried.Few knew, too, that the buildings sat atop the openings for two of the longest, most sop…

SAN DIEGO — Workers at warehouses just feet from the U.S-Mexico border would come and go at odd hours. Few, if any, knew what their trucks carried.

Few knew, too, that the buildings sat atop the openings for two of the longest, most sophisticated tunnels ever built to smuggle drugs from Mexico to the United States.

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