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Ground Zero's Roiling Dust Cloud Filled U.S. Scientists with Sense of Urgency.

Knight Ridder/Tribune Business News, February, 2002

By Andrew Schneider, St. Louis Post-Dispatch Knight Ridder/Tribune Business News

Feb. 10--DENVER--Chemists, geophysicists, astrophysicists and other scientists cloistered in the sprawling U.S. Geological Survey complex here are not emergency responders. Their work is detailed, methodical, with little room for haste or need for spontaneity. They track water poisoned by mining, search for cracks in the Earth's crust, and explore for minerals on Mars and Saturn.

But when a terrorist attack leveled the World Trade Center on Sept. 11, that all changed.

"We sat at home, watched that gray-white cloud roll over lower Manhattan, and knew damned well that the dust was going to hurt a lot of people," said Gregg Swayze, a USGS geophysicist. "I knew we...

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