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[bobi]

Parlant du WTC7 et de démolition contrôlée...

Le NIST publiait dernièrement le document suivant au sujet de leur enquête sur l'effondrement du WTC7 : WTC 7 Technical Approach and Status Summary (format PDF).

A la page 11, on lit :

Hypothetical Blast Analysis
NIST is analyzing scenarios for the event that initiated the collapse of WTC 7. As a part of this work, NIST is considering whether hypothetical blast events could have played a role in initiating the collapse. While NIST has found no evidence of a blast or controlled demolition event, NIST will estimate the magnitude of hypothetical blast scenarios that could have led to the structural failure of one or more critical elements as a result of blast.

Phase I - Identify hypothetical blast scenarios and materials, based on analysis and/or experience, for failing specified columns by direct attachment methods. Preliminary section cutting shall be considered. Compare estimated overpressures for each scenario against window strength.

Cette piste de recherche est une première pour le NIST, l'hypothèse d'une démolition contrôlée ayant été expressément balayée du revers de la main lors de la publication de leur hypothèse de travail en avril 2005.

Je me demande si ce revirement d'enquête ne vise pas à préparer le terrain pour mettre l'étrange effondrement du WTC7 sur le compte des réserves de carburant diesel qui y étaient entreposées. De fait, il y a un indice en ce sens à la page d’accueil du NIST :

Testimony of Dr. S. Shyam Sunder (NIST) Before New York City Council Joint Meeting, Committees on Lower Manhattan Redevelopment; Fire & Criminal Justice Services Hearing on “Oversight - Issues of Health and Safety Regarding the Storage of Diesel Fuel at 60 Hudson Street, Manhattan”, September 8, 2006

Autre passage intéressant, à la page 3 du document :

The investigation of the WTC 7 collapse resumed in October 2005.

Since then considerable progress has been made, including: review of nearly 80 boxes of new documents related to WTC 7
[...]
It is anticipated that a draft report will be released by [b]Spring 2007.

80 boites de nouveaux documents au sujet du WTC7 ? D'où viennent-elles ? Contiendraient-elles des informations au sujet du "hypothetical blast" que l'on s'apprête à vérifier ?

[bobi]

Pour ceux que ça intéresse, le NIST vient de publier son tout dernier rapport. Tiré de leur FAQ :

Did investigators consider the possibility that an explosion caused or contributed to the collapse of WTC 7?
Yes, this possibility was investigated carefully. NIST concluded that blast events inside the building did not occur and found no evidence supporting the existence of a blast event.

In addition, no blast sounds were heard on the audio tracks of video recordings during the collapse of WTC 7 or reported by witnesses. According to calculations by the investigation team, the smallest blast capable of failing the building’s critical column would have resulted in a sound level of 130 decibels (dB) to 140 dB at a distance of at least half a mile, if unobstructed by surrounding buildings. This sound level is consistent with a gunshot blast, standing next to a jet plane engine, and more than 10 times louder than being in front of the speakers at a rock concert.

For the building to have been prepared for intentional demolition, walls and/or column enclosures and fireproofing would have to be removed and replaced without being detected. Preparing a column includes steps such as cutting sections with torches, which produces noxious and odorous fumes. Intentional demolition usually requires applying explosive charges to most, if not all, interior columns, not just one or a limited set of columns in a building.

Is it possible that thermite or thermate contributed to the collapse of WTC 7?
NIST has looked at the application and use of thermite and has determined that its use to sever columns in WTC 7 on 9/11/01 was unlikely.

Thermite is a combination of aluminum powder and a metal oxide that releases a tremendous amount of heat when ignited. It is typically used to weld railroad rails together by melting a small quantity of steel and pouring the melted steel into a form between the two rails.

To apply thermite to a large steel column, approximately 0.13 lb of thermite would be needed to heat and melt each pound of steel. For a steel column that weighs approximately 1,000 lbs. per foot, at least 100 lbs. of thermite would need to be placed around the column, ignited, and remain in contact with the vertical steel surface as the thermite reaction took place. This is for one column … presumably, more than one column would have been prepared with thermite, if this approach were to be used.

It is unlikely that 100 lbs. of thermite, or more, could have been carried into WTC 7 and placed around columns without being detected, either prior to Sept. 11 or during that day.

Given the fires that were observed that day, and the demonstrated structural response to the fires, NIST does not believe that thermite was used to fail any columns in WTC 7.

Analysis of the WTC steel for the elements in thermite/thermate would not necessarily have been conclusive. The metal compounds also would have been present in the construction materials making up the WTC buildings, and sulfur is present in the gypsum wallboard used for interior partitions.

An emergency responder caught in the building between the 6th and 8th floors says he heard two loud booms. Isn’t that evidence that there was an explosion?
The sound levels reported by all witnesses do not match the sound level of an explosion that would have been required to cause the collapse of the building. If the two loud booms were due to explosions that were responsible for the collapse of WTC 7, the emergency responder—located somewhere between the 6th and 8th floors in WTC 7—would not have been able to survive the near immediate collapse and provide this witness account.

In others words, we're facing the usual paradox:

Failure of one or two columns due to fire and irregular damage causes the whole building to neatly implode in a fashion that visually mimics a near-perfect controlled demolition.

But:

A planned demolition would have required massive placements of explosives and pre-cuttings of every single column in the building. Otherwise it would have been impossible!

(Like, you can't just put explosives next to the one magic column the failure of which collapses the whole building. Only a fire could cause that!)

Ergo, instead of the Magic Bullet we have NIST's Magic Melting Column!



Désolé pour dégosiller tout ça dans la langue de Richler mais ça me sort comme ça.

[cyrano]

comme si on avait pu s'attendre à quoi que ce soit de percutant, venant d'un débat 'en profondeur' à radio can...

quand même, une réponse mérite qu'on s'y attarde.

l'Occident ne fabrique plus des systèmes de pensée structurés, qu'ils soient de type libéral ou marxiste. « La crise idéologique de l'Occident, c'est qu'il y a des consommateurs, mais plus de citoyens », affirme M. Zabouri.

ben voilà... à ne pas souligner trois fois parce que même les malcomprenants n'y entendraient que couic...

Mesdames et messieurs les Fourré(e)s

Il n'y a guère de liberté qu'en dedans de votre sphère personnelle, individuelle, et propre (si vous faites le ménage régulièrement)... Et encore... On ("Ooooonnnn" l'autre, les autres les "là-lô") en veut encore à votre maigre temps de cerveau disponible...

Avoir un Ennemi (notez la majuscule) c'est effrayant pour les gamins quand la grand matante leur raconte des histoires de bonhomme 7 heures ... Pis surtout ça simplifie les débats... Ça simplifie les choix... Donc ça simplifie la Li-ber-té...

La liberté c'est le fun (si si j'vous jure essayez pis surtout essayez au delà de vingt ans...! Ahem....)

Mais comme moi la liberté ça m'effraie ben j'vais voter conservateurs (pas de trouble tout restera comme c'était y a 200 ans) aux prochaines élections vu qu'ils connaissent le mode d'emploi de la liberté fiscale quitte à me fourrer ben raide pour habiller l'bourgeois; ou be donc PLC.... histoire d'avoir des vrais professionnels de la liberté au pouvoir... Qu'importe les libertés qu'ils prennent pour financer des happenings pour me convaincre que j'ai le sang rouge comme la sève d'érable... Ou encore bloc... Chers amis bloquistes et... heu bloqués... Vive Pauline! Pauline qui? Ou encore Françoise David qui hait son nom de famille tout en l'adorant parce qu'il la fait passer pour un gôrs! Une vrai contrôleuRE?

La liberté s'arrête à l'épiderme. Le reste... c'est du VOL!