US authorities have discovered, what they say is the largest and most sophisticated tunnel under their border with Mexico, one that was used by drug trafficking gangs. ... The secret route is cut a staggering 26 meters (85.3 feet) below ground, directly under a heavily protected sector of the frontier and is much larger than the 21 others detected under the border since the September 11, 2001 terror attacks on US soil, US officials said.
Wow, how desperate are people to come into the US that they are willing to built at least 21 tunnels to get here. US interests would be better served by making it easy to enter the country so that they could, at the very least, know who it is that is coming in.
HatTip: Professor Bainbridge