911 Blogger: Unanswered 9/11 questions May 16, 2008 ABC.net.au OLD but Mainstream that we missed

Although this is from May 16, 2008, it appeared in ABC.net.au and had 500 comments before the comments were closed.
http://www.abc.net.au/unleashed/stories/s2240510.htm
Unanswered 9/11 questions May 16, 2008 ABC.net.au
Hereward Fenton
side-by-side comparison of the collapse of WTC7 (Youtube)
The collapse of New York's World Trade Centre on September 11, 2001 is arguably one of the most well documented events in human history. Less well documented is the controversy over why the buildings fell as they did.
At the time of writing, 357 architectural and engineering professionals have signed a petition which directly challenges the National Institute of Standards & Training's official finding that the destruction of these massive buildings was caused solely by structural damage from the impact of jet airliners and the resulting fires.
The petition, demanding of Congress a truly independent investigation, states, in part:
"...the 9/11 investigation must include a full inquiry into the possible use of explosives that may have been the actual cause behind the destruction of the World Trade Center Towers and WTC Building 7."

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