another arent those flags a nice touch? another oh wait that one was blown too then there is all that air
I saw nothing about 'round tubes',but concrete rebaris round,and the fictitious 'nano thermate' wouldn't cause steel to disappear
Mushroom, you are simply incorrect. The WTC did not have concrete cores. The picture you posted is the Comcast Center in Philadelphia. I know this because I looked at the URL that you posted and went to the company's "projects" page. madisonconcrete.com/images/projects/comcast-12-14-062.jpg http://www.madisonconcrete.com/m_projects.php In fact, the building looks nothing like the WTC. The building next to it looks nothing like any buildings near the WTC. Who did you think you were going to fool with that lame picture? Beyond that, the Engineer of Record has confirmed that the WTC did not have a concrete core.
Emergency stairwells were framed with gypsum wall board curtain walls. In other words, sheet rock. They were not concrete.