Closing the Barn Door

Tinkering on a laptop, wearing a rumpled T-shirt and a soul patch goatee, this George Mason University graduate student has mapped every business and industrial sector in the American economy, layering on top the fiber-optic network that connects them.

He can click on a bank in Manhattan and see who has communication lines running into it and where. ........ he probes for critical links, trying to answer the question: "If I were Osama bin Laden, where would I want to attack?"
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