On Full Measure, we have reported on Mexican cartels using tunnels to traffic drugs and people underground into the U.S.
An update... Border officials have announced they’ve found the *longest* such tunnel ever. Customs and Border Protection says the tunnel starts in Tijuana, Mexico ... and stretches into San Diego California...more than three quarters of a mile. It's about five and a half feet tall and 2 feet wide, and 70 feet under the surface. They say it was a sophisticated operation...with a rail system, air ventilation, an elevator, and a drainage system.
So far, no arrests announced.