See other 9/11 Articles
Title: 9/11 demolition theory challenged
Source:
BBC
URL Source: http://news.bbc.co.uk/2/hi/science/nature/6987965.stm
Published: Sep 11, 2007
Author: staff
Post Date: 2010-07-17 17:31:29 by buckeroo
Ping List: *4um PSY-OP Club* Subscribe to *4um PSY-OP Club*
Keywords: None
Views: 17327
Comments: 1209
An analysis of the World Trade Center collapse has challenged a conspiracy theory surrounding the 9/11 attacks. The study by a Cambridge University engineer demonstrates that once the collapse of the twin towers began, it was destined to be rapid and total. One of many conspiracy theories proposes that the buildings came down in a manner consistent with a "controlled demolition". The study suggests a different explanation for how the towers fell. Over 2,800 people were killed in the devastating attacks on New York. After reviewing television footage of the Trade Center's destruction, engineers had proposed the idea of "progressive collapse" to explain the way the twin towers disintegrated on 11 September 2001. This mode of structural failure describes the way the building fell straight down rather than toppling, with each successive floor crushing the one beneath (an effect called "pancaking"). Resistance to collapse Dr Keith Seffen set out to test mathematically whether this chain reaction really could explain what happened in Lower Manhattan six years ago. The findings are to be published in the Journal of Engineering Mechanics. Previous studies have tended to focus on the initial stages of collapse, showing that there was an initial, localised failure around the aircraft impact zones, and that this probably led to the progressive collapse of both structures. Man stands amid rubble of the World Trade Center, AFP/Getty Once the collapse began, it was destined to be "rapid and total" In other words, the damaged parts of the tower were bound to fall down, but it was not clear why the undamaged building should have offered little resistance to these falling parts. "The initiation part has been quantified by many people; but no one had put numbers on the progressive collapse," Dr Seffen told the BBC News website. Dr Seffen was able to calculate the "residual capacity" of the undamaged building: that is, simply speaking, the ability of the undamaged structure to resist or comply with collapse. His calculations suggest the residual capacity of the north and south towers was limited, and that once the collapse was set in motion, it would take only nine seconds for the building to go down. This is just a little longer than a free-falling coin, dropped from the top of either tower, would take to reach the ground. 'Fair assumption' The University of Cambridge engineer said his results therefore suggested progressive collapse was "a fair assumption in terms of how the building fell". "One thing that confounded engineers was how falling parts of the structure ploughed through undamaged building beneath and brought the towers down so quickly," said Dr Seffen. The south tower of the World Trade Center collapses, AP Conspiracy theorists see evidence of a "controlled detonation" He added that his calculations showed this was a "very ordinary thing to happen" and that no other intervention, such as explosive charges laid inside the building, was needed to explain the behaviour of the buildings. The controlled detonation idea, espoused on several internet websites, asserts that the manner of collapse is consistent with synchronised rows of explosives going off inside the World Trade Center. This would have generated a demolition wave that explained the speed, uniformity and similarity between the collapses of both towers. Conspiracy theorists assert that these explosive "squibs" can actually be seen going off in photos and video footage of the collapse. These appear as ejections of gas and debris from the sides of the building, well below the descending rubble. Other observers say this could be explained by debris falling down lift shafts and impacting on lower floors during the collapse. Dr Seffen's research could help inform future building design.
[Thread Locked] Private Reply Ignore Thread
Top • Page Up • Full Thread • Page Down • Bottom/Latest
Comments (1-817) not displayed.
.
.
.
#818. To: buckeroo, RickyJ (#817)
You don't understand CD, do you .. especially on some of the largest buildings on the planet such as the twin towers, do you? It's apparent that you understand CD as well as you understand physics, in other words, you haven't the faintest clue about it. I imagine that you think of black ninjas creeping up the side panels of the WTC and then scurrying placing a CD... got photos? Oh yes buttercup, that's what I'm suggesting. I guess you missed the post that explained how the elevators were being serviced weeks before the 9/11 attacks, and that would have been the perfect opportunity to plant explosives. Oh wait, I DID post that to you, and now you're pretending that I didn't. How surprising.
I'm wondering more and more if you aren't really BAC...
Unlike yourself familiar with maintenance crew regular duties to service the buildings, I must ask was there an eye-witness about planting CD? Or were they in on the conspiracy, too?
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
which is proof enough that what they claimed to have happened did not happen the way they claim, and to top it off they've invested all their defense in the likes of bucky and AGairrectum.
Not true.
You know, you have called me a liar time and again throughout this thread. I have been tolerant, too, showing the errors of your own posts. You can't be objective to FACTS. You have your mind made up...
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
His hero, AlGore™ invented the Internet, did he not?
Oh, you have a widdle itty-bitty match stick struck under a chemtrail?
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
he'll do that as quickly as he'll come up with the videos showing what really happened at the pentagon.
facts? you've posted no facts WRT what really happened on 9-11-01.
Here is a link PROVING hanjour had a FAA certificate: www.gpoaccess.gov/serials...pdf/fullreport_errata.pdf .. you read it... I am tired of the BS that some of you wantonly spew. No wonder America is all fucked upped. The problem is far beyond just voters ... it is the speculators that don't know SHIT/
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
Where are your facts? That someone was caught up in a calamity?
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
I believe he made such a claim or something close to it.
Liberty is not a means to a higher political end. It is itself the highest political end. He (Gordon Duff) also implies that forcibly removing Obama, a Constitution-hating, on-the-down-low, crackhead Communist, is an attack on America, Mom, and apple pie. I swear these military people are worse than useless. Just look around at the condition of the country and tell me if they have fulfilled their oaths to protect the nation from all enemies foreign and domestic. No... you did Jimmy, time and time again... just distort the truth using your fucked-upped caricature of my posts within the single cell of your own mind. So, prove I have ever used AlGore as a reference. If you can't, you have lied again.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
if that were true bucky wouldn't be here, he wouldn't have real time to be here.
He will have a better chance of coming up with that guy's FAA commercial license than he will of coming up with Obama's real birth certificate. Still there is no video of the plane that supposedly hit the Pentagon. After all this time it has never been released. The supposed eyewitnesses to the event all have different stories, with many of them not aligning with the official story. Yet just about everyone has seen the videos of the planes hitting the Towers. Why does the Pentagon refuse to release one of the many high quality videos they have of the time flight 77 allegedly hit the Pentagon? My guess is that they show no plane hitting the Pentagon at that time. All it will show is the wall already blown up minutes earlier by bombs. It's amazing what Muslim terrorists living in caves in Afghanistan can do to get by the security of the most secure building in the world to plant those bombs. No one would ever buy that they were able to so such a thing, so the plane hitting the Pentagon story had to be made up in advance. And the reason they didn't just go ahead and hit the Pentagon with a plane like flight 77 is because Rumsfeld was there at the time and he didn't want to take a chance of being killed by a real jumbo jet smashing into the Pentagon.
God is always good!
The Pentagon? This thread is about the WTC... are you daft?
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
no that is a link claiming hanjour had an FAA certificate. cough up the certificate.
Where's the proof? I want to see a copy of the FAA license, and/or information as to what commercial flight school he attended, and the location and date of his FAA exam.
LOL!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Somebody who doesn't know shit about TCP/IP or how the Internet works invented his own real-time kernal. Yeah, and Al Gore was your co-developer right?
It is all related to the terror events of 9/11. They were all allegedly done by the same group. God is always good!
just like the ever vigilant member of the liar movement, bucky knows there are obvious holes in official fairy tale WRT the pentagon and those holes translate into holes in the whole 9-11 fabrication the government has put forth. the tale bucky defends holds as much truth as a sieve holds water.
dang! kick him where his testicles would be if he had any why don't you.
Where's Orly Taitz, Phil Allen Berg, and J. Allen Keyes when you need them? MWAHAHAHAHAHAH!!!!
---------------------------------------------------------------------------------------------------------------------------------- As with Obama birth certificate, k00ks don't call the shots, and to order someone else to produce evidence, the complaining party needs to have credible evidence of its own. Nobody is going to wet nurse a whiner just because he's throwing tantrums.
---------------------------------------------------------------------------------------------------------------------------------- If they ever do, I'm sure you will suck up to them just as you do the ones calling the shots now.
God is always good!
Right, so cough up the FAA commercial license, or STFU.
Looks like the liar movement's not doing so well.
Ask'em about Barry Jennings. That's always fun...
Or what happened to the pentagon videos?
Probably the same the same thing that happened to the high quality videos of the moon landings. They got taped over to save money. LOL!
God is always good!
k00k ;-)
lol Looks like a Bingo to me. :)
------- "They're on our left, they're on our right, they're in front of us, they're behind us...they can't get away this time." -- Col. Puller, USMC
MWAHAHAHAHAHAH!!!! Where's your answer to my question about why there's no engine-noise in the background of those alleged phone calls from the alleged planes? Where's a valid source for your assertion, and Wikipedia's, that "Among the uncertain parameters was the status of the cockpit door, which showed no sign of having been opened during the hijacking or previous 40 hours, including 11 flights prior to the hijacking.[1]"? Your own Wikipedia reference does indicate that the evidentiary door parameters certainly don't support the hijacking story. Additionally, the rest of the statement, which evidently appears to be a fabrication, indicates as well that you need to remove #4 now from your itemized "not debunked" list. MWAHAHAHAHAHAH!!!! backatcha.
------- "They're on our left, they're on our right, they're in front of us, they're behind us...they can't get away this time." -- Col. Puller, USMC
Again, find a copy of the FAA commercial license and put this matter to rest. Right on the fucking video I linked, the flight instructor and the other instructors I linked to say Here is the video again. Looks like you need repitition to penetrate into whatever brain cells you have left.
---------------------------------------------------------------------------------------------------------------------------------- k00ks don't call the shots Right, so cough up the FAA commercial license, or STFU. Hire Oily Taitz, Phil Berg, or J. Alan Keyes to file 60 lawsuits that will all get dismissed, loser.
---------------------------------------------------------------------------------------------------------------------------------- Fifteen seconds and twenty two seconds are not CLOSE to 9.22 seconds and there has never been even a single shred of det cord, timing devices, or thermite/blasting igniters discovered at any site at any time. Show me even a single piece of any of the above, Half Truther.
---------------------------------------------------------------------------------------------------------------------------------- Find a copy of Hanjour's FAA Commercial Pilot's License. There are many unsubstantiated CLAIMS made that he had one, but not ONE single shred of evidence that he actually did. It would normally be something you could easily find, since it's a critical claim made by the government that Hanjour did in fact have one. That there is absolutely no copy presented to the public as evidence that he DID have one indicates he more than likely DIDN'T. Being that he HAD no flying skills, it's obviously just an empty claim, and he more than likely possessed a forged document.
Fifteen seconds and twenty two seconds are not CLOSE to 9.22 seconds It is RELATIVELY CLOSE, in that we aren't talking about the difference between 9 seconds and 120 seconds, we're talking about the difference between 9 and 15. 9 seconds for absolute freefall through a vacuum, and 15 (alleged by YOUR cherry picked source) for the total collapse, where you admit that it took approximately 6 seconds to smash and destroy every undamaged support member of a 110 story building, pulverized it, and cause it to completely disintegrate and collapse, all without extra help. Ok bud, you're really making a lot of sense here... and there has never been even a single shred of det cord, timing devices, or thermite/blasting igniters discovered at any site at any time. How many office chairs were found? How many PC's, fax machines, or any other identifiable object? None.
So you think airlines set up their satellite phones noise filters to capture jet engine sounds instead of voice conversation? And you think somebody speaking quickly and urgently into the telephone about a hijacking and people getting their throats slashed is going to talk sotto voce so as to make sure the person getting called hears jet noise in the background? What a wack question. You can't even read a footnote? ---------------------------------------------------------------------------------------------------------------------------------- Which aircraft do you allege had "satellite phones" onboard?
Comments (859 - 1209) not displayed.
Top • Page Up • Full Thread • Page Down • Bottom/Latest
"The real deal is this: the ‘royalty’ controlling the court, the ones with the power, the ones with the ability to make a difference, with the ability to change our course, the ones who will live in infamy if we pass the tipping points, are the captains of industry, CEOs in fossil fuel companies such as EXXON/Mobil, automobile manufacturers, utilities, all of the leaders who have placed short-term profit above the fate of the planet and the well-being of our children." - James Hansen
#819. To: buckeroo (#817)
(Edited)
ROTFL.
"The real deal is this: the ‘royalty’ controlling the court, the ones with the power, the ones with the ability to make a difference, with the ability to change our course, the ones who will live in infamy if we pass the tipping points, are the captains of industry, CEOs in fossil fuel companies such as EXXON/Mobil, automobile manufacturers, utilities, all of the leaders who have placed short-term profit above the fate of the planet and the well-being of our children." - James Hansen
#820. To: FormerLurker (#818)
I guess you missed the post that explained how the elevators were being serviced weeks before the 9/11 attacks, and that would have been the perfect opportunity to plant explosives.
#821. To: FormerLurker (#707)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#822. To: buckeroo, RickyJ, FormerLurker (#808)
All BLDGS UNDER CD fall at freefall speeds...
"So, now I am a liar, a lamebrain and a dimwit." -- buckeroo, circa 2010-07-16 20:04:00 ET
#823. To: IRTorqued (#821)
#824. To: abraxas, FormerLurker, buckeroo, RIckyJ, James Deffenbach (#759)
Didn't you know that Buck is the Alpha and the Omega of the Internet?
"So, now I am a liar, a lamebrain and a dimwit." -- buckeroo, circa 2010-07-16 20:04:00 ET
#825. To: wudidiz (#822)
#826. To: FormerLurker (#737)
Again, find a copy of the FAA commercial license and put this matter to rest.
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#827. To: buckeroo (#823)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#828. To: IRTorqued (#826)
#829. To: IRTorqued (#827)
you've posted no facts WRT what really happened on 9-11-01.
#830. To: wudidiz (#824)
His hero, AlGore™ invented the Internet, did he not?
Lord Acton
OsamaBinGoldstein posted on 2010-05-25 9:39:59 ET (2 images) Reply Trace
#831. To: James Deffenbach (#830)
I believe he [buckeroo]made such a claim or something close to it.
#832. To: FormerLurker (#770)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#833. To: IRTorqued (#826)
(Edited)
#834. To: RickyJ (#833)
My guess is that they show no plane hitting the Pentagon at that time.
#835. To: buckeroo (#828)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#836. To: buckeroo (#828)
Here is a link PROVING hanjour had a FAA certificate: www.gpoaccess.gov/serials...pdf/fullreport_errata.pdf .. you read it... I am tired of the BS that some of you wantonly spew.
"The real deal is this: the ‘royalty’ controlling the court, the ones with the power, the ones with the ability to make a difference, with the ability to change our course, the ones who will live in infamy if we pass the tipping points, are the captains of industry, CEOs in fossil fuel companies such as EXXON/Mobil, automobile manufacturers, utilities, all of the leaders who have placed short-term profit above the fate of the planet and the well-being of our children." - James Hansen
#837. To: buckeroo, IRTorqued (#770)
My RT kernal. I deliver some of the fastest response times under the Sun.... it is proprietary.
"The real deal is this: the ‘royalty’ controlling the court, the ones with the power, the ones with the ability to make a difference, with the ability to change our course, the ones who will live in infamy if we pass the tipping points, are the captains of industry, CEOs in fossil fuel companies such as EXXON/Mobil, automobile manufacturers, utilities, all of the leaders who have placed short-term profit above the fate of the planet and the well-being of our children." - James Hansen
#838. To: buckeroo (#834)
The Pentagon? This thread is about the WTC... are you daft?
#839. To: RickyJ (#834)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#840. To: FormerLurker (#837)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#841. To: buckeroo, FormerLurker, (#836)
Where's the proof? I want to see a copy of the FAA license, and/or information as to what commercial flight
One of the major consequences of the 9/11 movement has been to draw enormous amounts of energy and effort away from activism directed to real and ongoing crimes of state, and their institutional background, crimes that are far more serious than blowing up the WTC would be, if there were any credibility to that thesis. That is, I suspect, why the 9/11 movement is treated far more tolerantly by centers of power than is the norm for serious critical and activist work....Noam Chomsky
#842. To: FormerLurker, buckeroo (#737)
(Edited)
Again, find a copy of the FAA commercial license and put this matter to rest.
One of the major consequences of the 9/11 movement has been to draw enormous amounts of energy and effort away from activism directed to real and ongoing crimes of state, and their institutional background, crimes that are far more serious than blowing up the WTC would be, if there were any credibility to that thesis. That is, I suspect, why the 9/11 movement is treated far more tolerantly by centers of power than is the norm for serious critical and activist work....Noam Chomsky
#843. To: AGAviator (#842)
As with Obama birth certificate, k00ks don't call the shots
#844. To: AGAviator (#842)
k00ks don't call the shots
"The real deal is this: the ‘royalty’ controlling the court, the ones with the power, the ones with the ability to make a difference, with the ability to change our course, the ones who will live in infamy if we pass the tipping points, are the captains of industry, CEOs in fossil fuel companies such as EXXON/Mobil, automobile manufacturers, utilities, all of the leaders who have placed short-term profit above the fate of the planet and the well-being of our children." - James Hansen
#845. To: FormerLurker (#844)
"So, now I am a liar, a lamebrain and a dimwit." -- buckeroo, circa 2010-07-16 20:04:00 ET
#846. To: wudidiz (#845)
"If you love wealth more than liberty, the tranquility of servitude better than the animating contest of freedom, depart from us in peace. We ask not your counsel nor your arms. Crouch down and lick the hand that feeds you. May your chains rest lightly upon you and may posterity forget that you were our countrymen.”—Samuel Adams 
#847. To: Rotara (#846)
"So, now I am a liar, a lamebrain and a dimwit." -- buckeroo, circa 2010-07-16 20:04:00 ET
#848. To: wudidiz (#847)
Or what happened to the pentagon videos?
#849. To: RickyJ (#848)
"So, now I am a liar, a lamebrain and a dimwit." -- buckeroo, circa 2010-07-16 20:04:00 ET
#850. To: RickyJ (#833)
And the reason they didn't just go ahead and hit the Pentagon with a plane like flight 77 is because Rumsfeld was there at the time and he didn't want to take a chance of being killed by a real jumbo jet smashing into the Pentagon.
#851. To: AGAviator (#841)
(Edited)
Where's Orly Taitz, Phil Allen Berg, and J. Allen Keyes when you need them?
#852. To: FormerLurker, buckeroo (#737)
Oh so all of his other instructors were wrong, and only the one who somewhat supports YOUR view is the fountain of truth. What a jackass you are.
(1) He had a valid FAA pilot certificate, and
In typical Half Truther fashion, you only quote the parts you think will benefit your k00kspiracy theory.
(2) They did not think it that unusual or uncommon that he needed retraining for becoming safely trained to operate a Cessana 172.
One of the major consequences of the 9/11 movement has been to draw enormous amounts of energy and effort away from activism directed to real and ongoing crimes of state, and their institutional background, crimes that are far more serious than blowing up the WTC would be, if there were any credibility to that thesis. That is, I suspect, why the 9/11 movement is treated far more tolerantly by centers of power than is the norm for serious critical and activist work....Noam Chomsky
#853. To: FormerLurker (#844)
One of the major consequences of the 9/11 movement has been to draw enormous amounts of energy and effort away from activism directed to real and ongoing crimes of state, and their institutional background, crimes that are far more serious than blowing up the WTC would be, if there were any credibility to that thesis. That is, I suspect, why the 9/11 movement is treated far more tolerantly by centers of power than is the norm for serious critical and activist work....Noam Chomsky
#854. To: FormerLurker, buckeroo (#814)
what everybody here on this forum has said, is that the towers fell CLOSE to free fall speed, which is IMPOSSIBLE UNLESS controlled explosives were used,
One of the major consequences of the 9/11 movement has been to draw enormous amounts of energy and effort away from activism directed to real and ongoing crimes of state, and their institutional background, crimes that are far more serious than blowing up the WTC would be, if there were any credibility to that thesis. That is, I suspect, why the 9/11 movement is treated far more tolerantly by centers of power than is the norm for serious critical and activist work....Noam Chomsky
#855. To: AGAviator (#852)
"The real deal is this: the ‘royalty’ controlling the court, the ones with the power, the ones with the ability to make a difference, with the ability to change our course, the ones who will live in infamy if we pass the tipping points, are the captains of industry, CEOs in fossil fuel companies such as EXXON/Mobil, automobile manufacturers, utilities, all of the leaders who have placed short-term profit above the fate of the planet and the well-being of our children." - James Hansen
#856. To: AGAviator (#854)
"The real deal is this: the ‘royalty’ controlling the court, the ones with the power, the ones with the ability to make a difference, with the ability to change our course, the ones who will live in infamy if we pass the tipping points, are the captains of industry, CEOs in fossil fuel companies such as EXXON/Mobil, automobile manufacturers, utilities, all of the leaders who have placed short-term profit above the fate of the planet and the well-being of our children." - James Hansen
#857. To: GreyLmist, buckeroo (#851)
Where's your answer to my question about why there's no engine-noise in the background of those alleged phone calls from the alleged planes?
Where's a valid source for your assertion, and Wikipedia's, that "Among the uncertain parameters was the status of the cockpit door, which showed no sign of having been opened during the hijacking or previous 40 hours, including 11 flights prior to the hijacking.[1]"?
Right Here
One of the major consequences of the 9/11 movement has been to draw enormous amounts of energy and effort away from activism directed to real and ongoing crimes of state, and their institutional background, crimes that are far more serious than blowing up the WTC would be, if there were any credibility to that thesis. That is, I suspect, why the 9/11 movement is treated far more tolerantly by centers of power than is the norm for serious critical and activist work....Noam Chomsky
#858. To: AGAviator, GreyLmist (#857)
So you think airlines set up their satellite phones noise filters to capture jet engine sounds instead of voice conversation?
"The real deal is this: the ‘royalty’ controlling the court, the ones with the power, the ones with the ability to make a difference, with the ability to change our course, the ones who will live in infamy if we pass the tipping points, are the captains of industry, CEOs in fossil fuel companies such as EXXON/Mobil, automobile manufacturers, utilities, all of the leaders who have placed short-term profit above the fate of the planet and the well-being of our children." - James Hansen
.
.
.