Inside a tunnel under the U.S-Mexico border where cartels smuggle drugs

And here we are just a stones throw from the border. Crazy to think that when they found this tunnel, it was only about half this size. What you're going to be going into is an actual tunnel built by the bad guys.All right, so we've made it about 20 ft down. But this is where this system really opens up stretching back this way. The majority of the tunnels much deeper than this one.Most of them. Yeah, 20 ft. It doesn't really seem like we went anywhere to be honest with you.We've had them as deep as 98 ft b ...