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One notable example involves tunnels concealed beneath restaurants, such as a Pizza or Burger King, where law enforcement discovered hidden passageways used for drug and human trafficking. These tunnels are marvels of clandestine engineering—ventilated, lit, and capable of transporting personnel or cargo over significant distances without detection.
Furthermore, the trend toward sophisticated tunnel systems has escalated, with some reaching hundreds of yards into U.S. territory, complete with ventilation systems and even lighting. The cost of constructing such tunnels runs into millions, and despite technological efforts to detect or infiltrate them, agencies continue to face formidable obstacles.