Sujet A propos des (soi-disants ?) attentats 11 septembre 2001

Citation : Bon, que un type qui y a survécu, pense qu'il n'y a pas de "complot" ou plus vraissemblablement : "les faucons savaient et ont laissé faire", ben, ça apporte pas grand chose quoi.

Citation : j'ai eu l'occasion de discuter avec un responsable des services généraux des tours du WTC (on était coincés dans le même hotel à la nouvelle orléans pendant Katrina - y en a qui n'ont pas de bol tout de meme...) qui lui même était dans les tours le 11 septembre. Pour lui rien de tient dans les theses conspirationistes. c'était juste l'enfer, il a bien vu les avions (enfin, le 2ème, vu qu'il était encore dans le tour pour le premier).

Citation : Par contre ce qui ressort clairement de tout ça, c'est qu'il faudrait arrêter de faire de la géopolitique d'apprenti sorcier (un coup je te soutiens Ben laden cotnre les russes, un coup de file du gaz de combat à Saddam, un coup je soutiens le shah d'Iran à cause du pétrole...)
Ca c'est une réalité, et ce serait bien d'arrêter

Citation : Certes c'est en étranger, mais bon...

Citation : "On about a third of the face to the center and to the bottom — approximately 10 stories — about 25 percent of the depth of the building was scooped out." NIST also discovered previously undocumented damage to WTC 7's upper stories and its southwest corner.

Citation : According to NIST, there was one primary reason for the building's failure: In an unusual design, the columns near the visible kinks were carrying exceptionally large loads, roughly 2000 sq. ft. of floor area for each floor. "What our preliminary analysis has shown is that if you take out just one column on one of the lower floors," Sunder notes, "it could cause a vertical progression of collapse so that the entire section comes down."

Citation : There are two other possible contributing factors still under investigation: First, trusses on the fifth and seventh floors were designed to transfer loads from one set of columns to another. With columns on the south face apparently damaged, high stresses would likely have been communicated to columns on the building's other faces, thereby exceeding their load-bearing capacities.

Citation : Second, a fifth-floor fire burned for up to 7 hours. "There was no firefighting in WTC 7," Sunder says. Investigators believe the fire was fed by tanks of diesel fuel that many tenants used to run emergency generators. Most tanks throughout the building were fairly small, but a generator on the fifth floor was connected to a large tank in the basement via a pressurized line. Says Sunder: "Our current working hypothesis is that this pressurized line was supplying fuel [to the fire] for a long period of time."

Citation : WTC 7 might have withstood the physical damage it received, or the fire that burned for hours, but those combined factors — along with the building's unusual construction — were enough to set off the chain-reaction collapse.