FEMA WTC Study

The Federal Emergency Management Agency offers the
several hundred-pages study of the WTC collapse by FEMA
and the Amercian Society of Civil Engineers:

  http://www.fema.gov/library/wtcstudy.htm

While summaries of this report have been previously published
and reported, this full report is far superior to anything I've
seen on the disaster. It provides copious, excellent photographs,
diagrams, drawings, analyses, and finely detailed descrptions of
the aircraft, the hits, the initial damages, the subsequent damages,
the collapses, the assessments of the WTC debris and
evaluation of surrounding structures, with recommendations
for what needs to be done to prepare for future catastrophic events.

There is information in the report I've seen nowhere else, and it should
be studied widely to amplify and correct what has been reported in the
media.