A lie, you made up. Where is the engineering proof? Looks like you are stuck with BS, you say NIST has been invalidated, with no clue what probable means. Where is the engineering, you have no technical issues, you have BS?
Your CD is invalidated, it is a fantasy. 19 terrorists did 911, and the effects of fire caused WTC 7 to collapse. In addition, WTC was totaled by fire before it collapsed. It is sad to see people lie; you can't invalidate anything.
The only thing you can do is ...
http://911blogger.com/news/2014-03-07/being-smeared-911-truther-msm#comment-260973
Your approach, bash NIST, as a true NIST basher, you can't mention CD, you have no evidence. Your failed logic rests on lies about NIST, and then make the big lie, NIST is invalidated. Something you made up.
Okay, you have invalidated NIST in your mind, a delusional claim; where is your support for CD? How many people have fallen for your "new approach"? How many engineers have fallen for it? I only have 5.5 years of engineering school, why can't you convince men with all that fancy engineering talk? Wait, you never did anything but BS talk.