This April 25, 2015 photo, from the U.S. Border Patrol and introduced as evidence in U.S. District Court, shows a trolley in the Mexican side of a tunnel that Border Patrol agents said was used by Evelio Padilla. a Honduran national, to smuggle over 50 pounds of cocaine into the U.S. Padilla pleaded guilty Wednesday, Aug. 19, in federal court in San Diego to one count of possession of drugs with intent to distribute. (U.S. Border Patrol via AP); Credit: /AP

Yesterday, federal authorities announced the discovery of a tunnel running from Tijuana to San Diego… a tunnel used to run drugs.  This was the 13th such passage found along California’s border since 2006. 

There were metric tons of drugs found in the tunnel, consisting of marijuana and cocaine. It was transported through an incredibly narrow rail system that rain throughout the passage.

The construction of the tunnel was incredibly complex, featuring a ventilation and lighting system.

Take Two’s Alex Cohen spoke with  Elliot Spagat of the Associated Press for more.