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Originally Posted by CaptainCrunch
I don't know about physical walls being the answer especially on the U.S. mexican border, there's basically no wall that can't be dug around, under or crawled over. The Berlin wall was considered to be fairly leaky in terms of defectors making it to the other side.
I think the walls that you will see over the next few years are more in countries foreign policies. If America does leave Iraq does it usher in another period of U.S. isolationism both choosen and forced upon them. Do other nations firewall themselves from the trouble in Gaza.
I can see a lot of the more developed nations throwing up thier hands and deciding not to intervene or do business in the more volitile areas of the world.
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Technology today might make these impervious . . .
The Great Wall of Saudi Arabia . . . this is what $700 million will buy.
Outwardly the great desert wall will appear mundane, with two metal barriers running 100 metres apart, lined with barbed wire at the base and top.
On the Iraqi side, alarms will notify patrols if an intruder attempts to scale or cut through the fence. Between the two fences will be yet more barbed wire, piled in a tall pyramid.
But its effectiveness will rely on its more sophisticated or hidden countermeasures. Under the baking sand will be buried sensor cables relaying a silent alarm to monitoring posts at regular intervals along the border. At the posts, face-recognition software will process pictures relayed from cameras, which will also be able to operate at night.
Behind the line of the fence, command and control centres with heliports will provide bases for troops to respond to any alert.
Even spy satellites will not be able to unravel the fence's secrets. The source speculated the reason for the secrecy might be automated weapons systems attached to the fence that could fire on suspected intruders.
They seem serious about the word "sealing."
http://www.smh.com.au/news/world/gre...641578406.html
On the Mexico/USA frontier, its a great debate as to whether or not America actually wants that frontier sealed. Obviously there are elements that do but there are other elements that obviously don't. Wage inflation would certainly be a bigger issue in America if millions of Mexicans weren't flying over the border.
Cowperson