For information debunking the bizarre claims of the 9-11 conspiracy theorists there are a few good sites that go over the conspiracy arguments and offer valid scientific information in contrast to most of the conspiracy theorist claims that are not based on science or many facts for that matter.
Popular Mechanics... http://www.popularmechanics.com/technology/military_law/1227842.html They also published a more extensive book on the subject...
"Debunking 9/11 Myths: Why Conspiracy Theories Can't Stand Up to the Facts"
http://www.amazon.com/Debunking-11-Myths-Conspiracy-Theories/dp/158816635X National Institute of Standards and Technology reports on their WTC investigation can be found here... http://wtc.nist.gov/reports_october05.htm http://wtc.nist.gov/pubs/factsheets/ http://wtc.nist.gov/pubs/ Other info and articles.....
- Scientific American
http://www.sciam.com/article.cfm?id=fahrenheit-2777 - Steven Dutch, Natural and Applied Sciences, University of Wisconsin
http://www.uwgb.edu/dutchs/pseudosc/911nutphysics.htm - PBS series NOVA
http://www.pbs.org/wgbh/nova/wtc/ Enjoy the reading.