1. science facts and 9/11 Truth controlled demolition movement position on steel and temperature is as follows:
a) Steel cannot melt as a result of office or airplane fuel fires. Yet there was a lot of molten steel found on the site.
b) Steel can significantly weaken, up to the point of failure, above 500F, therefore in the reach of fires in WTC.
HOWEVER, you would have seen random, localized failures, topovers, stumbling of blocks of towers. NOT - uniform, sudden, total collapse and pulverization at 110 floors per second. !!
In fact, what we have seen on the footage, is a controlled demolition.
2. Penthouse was pulverized and collapsed onto the rest of a tower - instead of falling in the path of lowest resistance - in the air - by the help of nanothermite masterpiece controlled demolition.
3. The best science sites with all the facts of controlled demolition are
http://ae911truth.org - http://stj911.org - http://journalof911studies.com
Portals are http://911blogger.com and http://911truth.org
4.
Lastly, I did forget to reply to your post - regarding installation of tons of explosive in preparation of attacks.
This installation is not only plausible, but perfectly possible.
People who carried tons of material in boxes never knew, what they are doing.
People who installed some wires, equipment, never knew what it was for.
Towers experienced complete repair power downs prior to attacks.
The director of security company of WTC was Marvin Bush, brother of never elected president.
So much for research facts.
Now we need independent investigation, who did what, how, who knew what.
Lets start with who had, and how they installed tons of nanothermite.
http://twitter.com/911news
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I might assume you, and many people, will have figured out inside, domestic and/or foreign complicity, the question now is, can it be told?
Will it hurt the country? It is also psychologically very difficult to admit this all truth and reality ---
9/11 is an inside operation controlled demolition.