print email comment close NIST and the World Trade Center URL: http://wtc.nist.gov Description: "In response to the [Sept. 11, 2001] WTC tragedy, the National Institute of Standards and Technology conducted a 3-year building and fire safety investigation to study the factors contributing to the probable cause (or causes) of post-impact collapse" of the towers. This website presents the 2005 findings and safety improvement recommendations of this nonregulatory federal agency, along with background, computer simulations, and images. Website continues to be updated with briefings, reports, and related material. Publisher: National Institute of Standards and Technology (NIST), U.S. Commerce Department Library of Congress Subject Headings: Building failures September 11 Terrorist Attacks, 2001 Structural engineering World Trade Center (New York, N.Y.) LII Database Information: Record 5695 created by Jennifer English on 07/01/2005 Last modification on 09/01/2009 Published: 07/01/2005   Republished: 09/03/2009 Funding agency: California State Library LII Item ID: http://lii.org/cs/lii/view/item/5695