Editor's Note: Authorities have uncovered an underground tunnel between Tijuana, Mexico and San Diego, California. Anderson will be live from this new tunnel tonight at 10 p.m. ET.
Anderson Cooper | BIO
Heading to San Diego, where once again an enormous tunnel has been discovered. It was being built to smuggle people and/or drugs from Tijuana into the US.
The level of sophistication of these tunnels is extraordinary. In addition to lighting, electrical, and ventilation systems, this new one even has an elevator on the Tijuana side. It was still being built when it was discovered, and authorities arrested more than a dozen men inside.
A few years ago we got an exclusive look at another tunnel U.S. authorities had just discovered that opened up into a warehouse on the U.S. side. It wasn't clear how long that one had been in operation. Watch our report from 2006 here.
Tonight we'll take you deep underground inside the new tunnel, and we'll update you on the war Mexico is fighting against drug traffickers - a war that has claimed more than 7,000 lives this year alone.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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