"Willy Loman" aka Scott Creighton Wonders Where the Trusses Went...

His premise is that with the trusses and floor pans (which held the concrete floors) essentiallly missing in any recognizable form from the debris pile, it is possible that they are accounted for in the "iron rich spheres" found in the dust.  He specuolate son the use of det-cord, normally used to set off explosives in a conventional demolition, as an explosive unto itself, installed under the pretext of an internet wiring upgrade.  I'm not totally convinced of the proposition, but I do find the absence of the trusses and floor pans from the debris to be curious...  Take it away, Scott: 

Sometimes in an investigation, what you don’t find at the crime scene is just as important as what you do find. Provided you know what to look for and you understand why it is or isn’t there.

With that in mind, I offer for your consideration, the great mystery of the missing Trusses and Floor-Pans of the World Trade Center towers 1 and 2… and the (estimated) 10 tons of “iron-rich” spheres found in the dust at Ground Zero by every single investigative agency that has bothered to look.

The 23,000 Missing Trusses of 9/11