I just saw some 'poster' on this site with some pics that 'claim' that the WTC Towers 1 and 2 were built using 'concrete cores' (no mention of WTC7, by the way).
After researching the construction, occupancy, EPA issues with asbestos, ownership, design, and construction phases (including photos and blueprints), and the evidence which is building in momentum (like a tsunami):
IT IS my belief that this weak attempt to state that the Towers were built with 'concrete cores' is not only weak and worthless, but an obvious obfuscation attempt to discredit the evidence of NANOTHERMETIC MATERIALS that have been discovered in the STEEL core columns, and the various dust samples, of these 'controlled demolitions'.
From 9/11 Blogger, a link to the videos of a physicist who did the 'due diligence' research (and NO, it isn't Steven Jones):
http://911blogger.com/news/2010-10-21/physicist-jeff-farrer-one-sci...

Perhaps it is the recent forced release under the FOIA Act from N.I.S.T. which has this latest 'theory' of 'CONCRETE CORES' being tried out on the sites like 12.160:
http://911blogger.com/news/2010-08-31/international-center-911-stud...

The 'DARPA SPACE-ALIEN MICRONUKE LASERS' thingie didn't work, so this NEW thing is to claim that there WAS NO STEEL in the core columns; but photographic evidence of the construction phases proves otherwise:
http://911research.wtc7.net/wtc/evidence/photos/wtc1cons1.html

I just thought that the visitors and members of 12.160 should be WARNED.