http://gallery.usgs.gov/ en-us A list of photography and images from the U.S. Geological Survey's Multimedia Gallery (http://gallery.usgs.gov). http://gallery.usgs.gov/images/USGS.gif http://gallery.usgs.gov/ 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.

]]> unknown http://gallery.usgs.gov/photos/09_12_2011_xcs1VJi77P_09_12_2011_0 http://gallery.usgs.gov/photos/09_12_2011_xcs1VJi77P_09_12_2011_0 Mon, 12 Sep 2011 00:00:00 EDT September11 dust ash contaminants asbestos WorldTradeCenter 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.

]]> U.S. Navy Photographer's Mate 2nd Class Jim Watson http://gallery.usgs.gov/photos/09_12_2011_xcs1VJi77P_09_12_2011_1 http://gallery.usgs.gov/photos/09_12_2011_xcs1VJi77P_09_12_2011_1 Mon, 12 Sep 2011 00:00:00 EDT September11 dust ash smoke contaminants WorldTradeCenter 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).

]]> unknown http://gallery.usgs.gov/photos/09_12_2011_xcs1VJi77P_09_12_2011_2 http://gallery.usgs.gov/photos/09_12_2011_xcs1VJi77P_09_12_2011_2 Mon, 12 Sep 2011 00:00:00 EDT September11 dust ash contaminants thermal fire WorldTradeCenter