This video and article first appeared on Foxnews.com.
Mexican drug cartels are using high-tech tunnels with rail systems to smuggle drugs under the U.S.-Mexico border, posing a major challenge for federal authorities. Former DEA agent Michael Brown warns these tunnels are sophisticated “underground cities” hidden beneath storefronts and warehouses. While law enforcement works to shut them down, the fight against subterranean smuggling remains a top priority.
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