Border Patrol agents in San Diego found a sophisticated cross-border smuggling tunnel that connects California to Tijuana, Mexico. The tunnel reportedly extended more than 1,000 feet into the United States from Mexico.
San Diego Sector Tunnel Team agents discovered a cross-border tunnel in April that appeared to still be under construction, according to a statement from U.S. Customs and Border Protection. The agents found that the tunnel crossed under the Otay Mesa Port of Entry.
“As we continue to strengthen the nation’s air, and maritime border security, it’s not surprising that foreign terrorist organizations would resort to underground routes,” said Jeffrey D. Stalnaker, Acting Chief Patrol Agent of the San Diego Sector. “Disruption of narcotics smuggling tunnels is critical to protecting American lives.”
www.breitbart.com
If we have technology that will see through walls I wonder if we have something that can "see" tunnels.
San Diego Sector Tunnel Team agents discovered a cross-border tunnel in April that appeared to still be under construction, according to a statement from U.S. Customs and Border Protection. The agents found that the tunnel crossed under the Otay Mesa Port of Entry.
“As we continue to strengthen the nation’s air, and maritime border security, it’s not surprising that foreign terrorist organizations would resort to underground routes,” said Jeffrey D. Stalnaker, Acting Chief Patrol Agent of the San Diego Sector. “Disruption of narcotics smuggling tunnels is critical to protecting American lives.”

'Sophisticated Cross-Border Tunnel' Found Linking San Diego to Tijuana
Border Patrol agents in San Diego found a sophisticated cross-border smuggling tunnel that connects California to Tijuana, Mexico. The tunnel reportedly extended more than 1,000 feet into the United States from Mexico. | Border / Cartel Chronicles

If we have technology that will see through walls I wonder if we have something that can "see" tunnels.