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terror attack vulnerabilities brown dnt tsr_00013715
terror attack vulnerabilities brown dnt tsr_00013715

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    How vulnerable are citizens to terror attacks?

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How vulnerable are citizens to terror attacks?

Law enforcement officials in the U.S. are increasingly concerned about protecting railways from terrorists. CNN's Pamela Brown reports.

How vulnerable are citizens to terror attacks?

Law enforcement officials in the U.S. are increasingly concerned about protecting railways from terrorists. CNN's Pamela Brown reports.