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Scientists to Simulate NYC Gas Attack
NEW YORK (AP) -- Government scientists who want to find out how fast and far a chemical attack could move through a city will release colorless, harmless gases in subways, an office building and some of Manhattan's most crowded streets to see which way the wind blows them.
Ultimately scientists hope they can produce a computerized model of air flow patterns that could help authorities decide where to evacuate people and in which direction after a bioterrorist attack.
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Allwine is overseeing the Urban Dispersion Project, which started five years ago with pilot programs in Salt Lake City and Oklahoma City, and came to New York City in March, tracking the path of nontoxic, odorless gases through well-traveled sections of midtown Manhattan.
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On six days over the next three weeks, depending on the weather, 180 blue plastic "tracer" boxes will track the path of gases released at eight different locations. The gases will be released at two locations near Rockefeller Center, one near Times Square and one on a subway platform at 50th Street and Broadway, serving the 1 and 9 lines. A half dozen white vans will also be traveling the city collecting air samples.
http://www.rednova.com/news/science/199381/scientists_to_simulate_nyc_gas_attack/