I have reviewed all the videos & all the controlled demolition theory's as well as the prints for WTC 1&2 with a few from 7... I disagree with the statement "overbuilt"... in fact the towers were the lightest tall structures of the time... Just because there seems to be massive steel in the sections of the inner & outer frame one must take In the weak link located @ the floor truss system supports... There is a weight spec for this connection that was "massively "overloaded" on 911... any structure would fail under that much sheer force to spec ratio considering the floors held the structure together... I think it would be hard to tell what the popping sounds were given the forces involved in the collapse... the audio from all the videos did not sound like high explosives or the lack of explosive flash's or the lack of fast blast waves ... the random puffs or squibs of smoke shows no logical pattern from a controlled demolition... the floor system fell ahead of the outer framing... the outer framing fell in random lengths with no pattern found in a controlled demolition... there is way too much speculation VS physics for the tower failures... WTC 7 was a very different structure & had design problems from the start... this is where I believe there were changes made to the standard building codes to allow for the construction to start with... this information is very hard to find & is buried within the port authority somewhere...

Shall we list all the impossibilities in the controlled demolition theories? Where to begin?

1) We have already discussed at length the impossibility of any scenario in which the twin towers and WTC 7 could have been rigged for controlled demolition. Even the industry standard approach for a controlled implosion of the towers would have been time consuming and difficult to accomplish without vacating the towers and shutting down all electric and water supplies for months. No demolition pros would bring thousands of electric or electronic detonators inside a building alive with radio and micro waves. (electric detonators are particularly sensitive to AM frequencies).

The belief that explosives and thermite charges were installed on every floor defies common sense and is an insult to human intelligence. It is particularly idiotic to believe that such a massive demolition system could have survived the impact of the jetliners.

2) The impossibilities of using thermite and nano-thermite charges.

* A thermite cutting charge must be attached directly to bare steel.

* A thermite charge requires a high temperature ignition source, such as a magnesium ribbon.

* A thermite charge burns very bright, similar to an electric arc welder.

* A thermite charge does not explode, it does not instantly weaken or cut through steel beams. (at least 0.13 pounds of thermite would be required to heat each pound of a steel section to approximately 700 degrees Celsius (the temperature at which steel weakens substantially). Therefore, while a thermite reaction can cut through large steel columns, many thousands of pounds of thermite would need to have been placed inconspicuously ahead of time, remotely ignited, and somehow held in direct contact with the surface of hundreds of massive structural components to weaken the building. This makes it an unlikely substance for achieving a controlled demolition.)

*Depending on the thickness and strength of a steel beam or column, a thermite charge may take a minute or more to weaken or cut through the steel.

Had thermite charges been used to weaken or cut steel columns in the twin towers, it would have been necessary to ignite them well before, even minutes before, the collapse was initiated. And, due to the brightness of these charges, we would see visual evidence of them burning throughout the entire height of the towers.

* The advanced nano-thermite developed by LLNL was in the research and experimental stage in 2001. It was not available in sufficient quantities for applications out side military weapons research.

You wrote: "the floor system fell ahead of the outer framing..."
This is not true. All one has to do to see that this is a lie is to watch the video of the North Tower as it collapses. At least 5 or 6 floors of the outer wall structure collapses at the beginning of the collapse. This could only be accomplished if all the outer columns were cut at the same time. Watch the radio tower which sits on top of the massive steel center core. It falls at the same pace as the outer walls when the floors collapsing on top of each other could not have damaged the center core.

Here's what cut all the steel columns which enabled both towers to reach the ground in less than 15 seconds:
"“In early 1997, Lawrence Livermore successfully tested a shaped charge that penetrated 3.4 meters of high-strength armor steel. The largest diameter precision shaped charge ever built produced a jet of molybdenum that traveled several meters through the air before making its way through successive blocks of steel. A shaped charge, by design, focuses all of its energy on a single line, making it very accurate and controllable.”
Here's how they pulverized all the concrete in the towers:
"At LLNL, government scientists have learned how to combine the exothermic power of the thermite reaction with organic moieties to produce a thermite reaction that can do pressure/volume work (i.e. turn massive quantities of concrete and other building materials into dust)."

Take a look-back and you'll find much more that I've posted besides the post you are replying to. There is so much evidence that it wasn't muslims and that international zionism/Mossad/neocons did 9-11 that a single post could not be the entire "version of conclusive proof.

Among the writings that memorialize evidence are:

About 10 books by David Ray Griffin ...

Solving 9/11 by Christopher Bollyn

The newest book by Bollyn

Crossing the Rubicon by Michael Ruppert

A number of articles and books by Victor Thorn

911truth.org

ae911truth.org

911MISSINGLINKS documentary

I could go on and on--and you can deny and deny.

One of us is lying and depends upon lies for sustaining the viewpoint.

What you say is opinion and speculation and even if it were all provable on your side it still would not prove that government story to be true, and in fact is a minuscule, near irrelevant part of the debate and I met in a waste anymore time debating this with you guys who claim to not see what is obvious or visually evident in the videos that have been provided. There are so many factors that you just carelessly eject from your mind and that just have no answer other than that it was an inside job, but instead you all insist on dealing with technical issues that still don't prove that the buildings wern't planned demolition and that makes no sense that you would do that if you are really interested in the truth rather than just defending against something you just don't want to believe. Please don't reply. I have no interest in continuing this.

Shall we list all the impossibilities in the controlled demolition theories? Where to begin?

1) We have already discussed at length the impossibility of any scenario in which the twin towers and WTC 7 could have been rigged for controlled demolition. Even the industry standard approach for a controlled implosion of the towers would have been time consuming and difficult to accomplish without vacating the towers and shutting down all electric and water supplies for months. No demolition pros would bring thousands of electric or electronic detonators inside a building alive with radio and micro waves. (electric detonators are particularly sensitive to AM frequencies).

The belief that explosives and thermite charges were installed on every floor defies common sense and is an insult to human intelligence. It is particularly idiotic to believe that such a massive demolition system could have survived the impact of the jetliners.

2) The impossibilities of using thermite and nano-thermite charges.

* A thermite cutting charge must be attached directly to bare steel.

* A thermite charge requires a high temperature ignition source, such as a magnesium ribbon.

* A thermite charge burns very bright, similar to an electric arc welder.

* A thermite charge does not explode, it does not instantly weaken or cut through steel beams. (at least 0.13 pounds of thermite would be required to heat each pound of a steel section to approximately 700 degrees Celsius (the temperature at which steel weakens substantially). Therefore, while a thermite reaction can cut through large steel columns, many thousands of pounds of thermite would need to have been placed inconspicuously ahead of time, remotely ignited, and somehow held in direct contact with the surface of hundreds of massive structural components to weaken the building. This makes it an unlikely substance for achieving a controlled demolition.)

*Depending on the thickness and strength of a steel beam or column, a thermite charge may take a minute or more to weaken or cut through the steel.

Had thermite charges been used to weaken or cut steel columns in the twin towers, it would have been necessary to ignite them well before, even minutes before, the collapse was initiated. And, due to the brightness of these charges, we would see visual evidence of them burning throughout the entire height of the towers.

* The advanced nano-thermite developed by LLNL was in the research and experimental stage in 2001. It was not available in sufficient quantities for applications out side military weapons research.

You forget the fact that Turner Construction was contracted to do an upgrade on the steel insulation in both towers in the late 1990s. Turner Construction had partnered with Controlled Demolitions, Inc. to blow up the Seattle Kingdome just a year earlier. An insulation upgrade would have given Turner personnel access to all the steel structure in the towers.
Upon examining photos of the massive steel beams in the debris, it is apparent they were cut by a new cutting charge technology developed by Lawrence Livermore National Laboratories which is capable of cutting heavy steel in a smooth cut.
“In early 1997, Lawrence Livermore successfully tested a shaped charge that penetrated 3.4 meters of high-strength armor steel. The largest diameter precision shaped charge ever built produced a jet of molybdenum that traveled several meters through the air before making its way through successive blocks of steel. A shaped charge, by design, focuses all of its energy on a single line, making it very accurate and controllable.” https://kendoc911.wordpress.com/wtc-towers/nano-thermite/

An explosive nano-thermite developed by the same Lab was used to pulverize all the concrete floor slabs.
"At LLNL, government scientists have learned how to combine the exothermic power of the thermite reaction with organic moieties to produce a thermite reaction that can do pressure/volume work (i.e. turn massive quantities of concrete and other building materials into dust)." https://kendoc911.wordpress.com/wtc-towers/nano-thermite/

An airliner is not made of aluminum foil and drinking straws. Jetliners are built quite strong. After all they must withstand the stresses of high speed flight. These include Tension, Compression, Torsion/Tensile, Shear & Bending, plus thermal stress (radical temperature vatiations with altitude changes and the internal heat stresses produced by engine operation.)

That said, it is obvious that the jetliners did, in fact, penetrate the perimeter walls of the towers and, as they disintegrated at high speed through the entire width of buildings, steel core columns were severely damaged or severed.

No, I didn't forget any of that. We have already noted that fire proofing upgrades prior to 9/11 were completed on 10 floors in the South Tower and 20 floors in the North Tower. TCC WAS NOT the contractor.

The Kingdome was due for replacement. The holding company contracted TCC to do a study. After more than a year and a half of structural analysis, investigation of site conditions/adjacent improvements to remain and consideration of all of the political and public relations aspects of the project, an implosion solution was considered to be the best and safest means of demolishing the structure. It was then that Turner brought in CDI to do the job.

The cuts on the beams in the rubble were done with thermic lances during removal of debris. Obviously they had to cut up the steel to free it and to move it out. The nano-thermite you keep referring to WAS NOT available in sufficient quantities in 2001, and what limited quantities that were available was restricted to military weapons research.

But go ahead and keep spinning your fictional yarn about missions impossible.

Turner Construction was bought by Hochtief AG of Germany in 1999 before Turner had finished the insulation upgrade.
Hochtief AG had worked for the Third Reich during Hitler's reign.
http://911blogger.com/news/2009-03-04/pre-911-wtc-steel-fireproofingpost-911-ground-zero-clean-contractor-planned-2000-seattle-kingdome-demolition

An implosion solution was chosen as the best method of demolishing the twin towers and WTC7 as well. Turner Construction, now under the name of Hochtief AG, turned again to Controlled Demolitions, Inc., for their expertise.

Who told you there was not enough nano-thermite in 2001? Did the perpetrators give you that information?

.