LOOK. Shop without customers leads investigators to huge high-tech smuggling tunnel between US and Mexico

On the outside, the ‘Buy 4 Less’ store in the American city of San Diego seemed like an inconspicuous business. There was only one problem: no customers ever came. What started with suspicion about mysterious men with suitcases led American investigators to a huge high-tech smuggling tunnel belonging to Mexico’s notorious Jalisco drug cartel.

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