Here are links to the above websites:
http://www.wtc7.net

http://physics911.ca

http://www.911truth.org

http://www.globalresearch.ca

http://reopen911.org/index.htm

http://www.911blimp.com/home.shtml

http://911Research.wtc7.net

(Webmaster note: I deleted the other link from the list because I got a 404 Error when I tried to visit the website.)