World Trade Center Building Performance Study: Data Collections, Preliminary Observations, and Recommendations [open html - 51KB]
From the FEMA Library Abstract: This report presents observations, findings, and recommendations regarding the performance of buildings affected by the September 11 attacks on the WTC towers in New York City. The report also describes the structural and fire protection features of the affected buildings and their performance in response to the terrorist attacks.
FEMA Publication 403
United States Federal Emergency Management Agency: http://www.fema.gov/library/viewRecord.do?fromSearch=fromsearch&id=1728