A recently released New York City Police Department (NYPD) report designed "to aid the New York City building community by providing information on how to prevent and mitigate the effects of a terrorist attack on a building" states that many of its guidelines incorporate recommendations and best practices developed by the National Institute of Standards and Technology (NIST). The NIST recommendations were a result of the agency's six-year investigation of the collapses of three World Trade Center (WTC) buildings following the terrorist attacks of Sept. 11, 2001. The NYPD report, Engineering Security: Protective Design for High Risk Buildings may be downloaded at www.nyc.gov/html/nypd/html/counterterrorism/engineeringsecurity.shtml. Information on NIST's WTC investigation is available at http://wtc.nist.gov. For a list of the NIST recommendations for building codes and standards, see "NIST's Recommendations Following the Federal Building and Fire Investigation of the World Trade Center Disaster" at http://wtc.nist.gov/recommendations/recommendations.htm.