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December 25, 2001 | From the Washington Post
After two years of experimenting in secret, Washington's Metro subway system will activate sensors in two downtown stations next month and become the first subway in the world that can detect a release of toxic chemicals. The move signals that the technology is ready for use in other subway systems, airports, malls and other large, enclosed public spaces, federal scientists say.
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NEWS
December 25, 2001 | From the Washington Post
After two years of experimenting in secret, Washington's Metro subway system will activate sensors in two downtown stations next month and become the first subway in the world that can detect a release of toxic chemicals. The move signals that the technology is ready for use in other subway systems, airports, malls and other large, enclosed public spaces, federal scientists say.
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