ThreatsWatch.Org: RapidRecon: Drug Tunnels - A Threat to Security

ThreatsWatch.Org: RapidRecon: Drug Tunnels - A Threat to Security: "The similarities are actually pretty striking. Both in Mexico and in Israel, underground tunnels present a significant challenge to law enforcement officials and security forces. What is actually most striking is the sudden attention being paid to the tunnels under the U.S.-Mexican border when their existence has been known since the 1990's (or before) and their sophistication has continued to evolve. The current issue of Time Magazine describes this growing threat.

As above ground border defenses and patrols get tougher, that subterranean vulnerability is becoming a growing problem. Since 2001, more than 100 tunnels have been discovered by U.S. law enforcement, compared with just 15 in the 1990s, and the pace is accelerating. Most of those have been uncovered through human intelligence, since there are no currently available technical means to reliably detect tunnels."