[South40]

Fencing is not the cure all and no one has said it is. Along with fencing comes motion sensors and other technology. Additionally, the traffic that passes through a tunnel after construction of said tunnel is marginal compared to the traffic that passes unfettered over a border that does not have a fence.

Here is what the border patrol says about fencing here in San Diego.

Today, Henry is assistant chief of the Border Patrol's San Diego sector. He says apprehensions here are down 95 percent, from 100,000 a year to 5,000 a year, largely because the single strand of cable marking the border was replaced by double — and in some places, triple — fencing.

The first fence, 10 feet high, is made of welded metal panels. The second fence, 15 feet high, consists of steel mesh, and the top is angled inward to make it harder to climb over. Finally, in high-traffic areas, there's also a smaller chain-link fence. In between the two main fences is 150 feet of "no man's land," an area that the Border Patrol sweeps with flood lights and trucks, and soon, surveillance cameras.

"Here in San Diego, we have proven that the border infrastructure system does indeed work," Henry says. "It is highly effective."

http://www.npr.org/templates/story/story.php?storyId=5323928

[discostu]

Plenty of people right here on this thread think if only there was a fence it would all go away. There’s a lot of panacea thinking in this country. And you still need PEOPLE. All the motion sensors in the world don’t mean jack if there isn’t actually somebody to respond.