http://gallery.usgs.gov/images/logos/usgs_only.jpg http://gallery.usgs.gov/ en-us OC_Web@usgs.gov (Office of Communications Web Group) http://gallery.usgs.gov/images/USGS.gif http://gallery.usgs.gov/ http://gallery.usgs.gov/photos/09_12_2011_xcs1VJi77P_09_12_2011_0 Sample of dust collected after the collapse of the World Trade Center on September 11, 2001. Sample shows particles of concrete, glass fiber, and chrysotile asbestos.

]]> http://gallery.usgs.gov/photos/09_12_2011_xcs1VJi77P_09_12_2011_1 Firefighters surrounded by clouds of smoke and dust of the World Trade Center after the terrorist attacks of September 11, 2001. Photographer's Mate 2nd Class Jim Watson, U.S. Navy.

]]> http://gallery.usgs.gov/photos/09_12_2011_xcs1VJi77P_09_12_2011_2 Thermal hotspots around the World Trade Center after the terrorist attacks of September 11, 2001. The images show hot spots and fires still burning in the debris as of September 16, 2001, which were reduced or eliminated by September 23, 2001. These images were produced by the USGS from data gathered during flyovers of the site using an Airborne Visible and Infra-Red Imaging Spectrometer (AVIRIS).

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