Architects and Engineers
I guess a lot of you have heard about the website ae911truth where a group of individuals claim that what happened to WTC 1, 2 and 7 could not have happened. This is just a claim, because they have nothing to show for their allegation that it could not have happened the way it did. You won't find any calculations that show how the NIST Report is wrong. On this site, you will find many structural engineers - those who actually know what they are talking about - explaining why the towers collapsed the way they did. So feel free to look at all the information I have gathered about the research done on the collapse on the towers. The research has been published in numerous engineering magazines and all over the internet on engineering sites (See the links on the right side of this site).
Only a handful of architects and engineers question the NIST Report, but they have never come up with an alternative. Although at first blush it may seem impressive that these people don't believe the NIST Report, remember that there are 123,000 members of ASCE(American Society of Civil Engineers) who do not question the NIST Report. There are also 80,000 members of AIA(American Institute of Architects) who do not question the NIST Report.
Although their field of expertise is not related to the construction of buildings - they don't seem to have a problem with that over at AE911truth - there are also 120,000 members of ASME(American Society of Mechanical Engineers) who do not question the NIST report. There are also 370,000 members of IEEE(Institute of Electrical and Electronics Engineers) who do not question the NIST report. There are also 40,000 members of AIChE(American Institute of Chemical Engineers) who do not question the NIST Report. There are also 35,000 members of AIAA (American Institute of Aeronautics and Astronautics) who do not question the NIST report. So who would you rather believe?