 According to a May,
2002 FEMA
report (from Chapter
5):
WTC 7 collapsed on September 11, 2001,
at 5:20 p.m. There were no known casualties due to
this collapse. The performance of WTC 7 is of
significant interest because it appears the collapse
was due primarily to fire, rather than any impact
damage from the collapsing towers. Prior to September
11, 2001, there was little, if any, record of
fire-induced collapse of large fire-protected steel
buildings. As can be seen in the photo
below (from Knoxville
News Sentinel Sept. 11 photo gallery, this
particular photo reportedly from the New York City
Office of Emergency Management), WTC 6, which was
immediately adjacent to WTC 1, has a large hole in the
middle from falling debris, yet did not collapse. In
contrast, WTC 7 (which had the US Secret Service and IRS
as tenants) is neatly collapsed between the unscathed
Federal Building and the NY Telephone building (see the
map below, which is from the Seattle
Post Intelligencer, which credits the New York
Times).
Note: the photo and the map are 180 degrees apart in
orientation, so you'll have to perform some mental
gymnastics. For example, the Federal Building is in the
lower-left of the photo and the upper-right of the map.
In contrast to WTC 1 and WTC 2, WTC 7 was a
traditional steel lattice structure (see the FEMA report
for detailed diagrams), so the "pancake" explanation
doesn't work for WTC 7. Indeed, the FEMA report is
unable to draw any conclusions and puts forth only some
hypotheses. The photo below, from the FEMA report (with
copyright credit to Roberto Rabanne), shows the
neatly-contained implosion of WTC.
To see a video of how WTC7 fell straight down in a
seemingly controlled manner, visit the
whatreallyhappened.com WTC 7
page.
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