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Electronic Borders

Duration:
10 minutes
First broadcast:
Monday 03 August 2009

Governments around the world are investing more and more money in shoring up their international borders. But this is not just a case of armed guards and high fencing; richer countries are using high technology to throw up electronic boundaries. Audrey Tinline examines whether these "virtual borders" will work and whether they're worth the billions of dollars being spent on them.

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