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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
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Keywords: None
Views: 19231
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.
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#66. To: farmfriend (#62)
CNN like all the other major media are controlled by the govt and publish/print/show only those things approved by the government. A friend I went to college with years ago is now a VP of an MSNBC division and lives in Connecticut. I had a conversation with her a few years ago and she told me I would be surprised by restrictions put on the media by the govt. It is called disinformation.
I enjoy reading a lot of your posts and I agree with you about being skeptical and suspicious of an over-reaching government; we must be vigilant to hold-on to what little is left. But I don't believe for a second that a government entity in the USA would knowingly perpetrate an act against the people. And as I expressed, there is no evidence or witnesses of such an act occurring. So, on this thread, lets review the government's reports of what happened BEFORE dismissing it altogether and adopting other ideas. All of the pdfs are available on the NIST website.... the hotlinks that I want to encourage ..... I have posted on this thread.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
When I hear explosions I tend to think that the buildings where those explosions occured would, naturally, have a loss in structural integrity. Firefighters would be bright enough to take this logical leap as well.
"The conscious and intelligent manipulation of the organized habits and opinions of the masses is an important element in democratic society. Those who manipulate this unseen mechanism of society constitute an invisible government which is the true ruling power of our country. ... We are governed, our minds are molded, our tastes formed, our ideas suggested, largely by men we have never heard of." Edward Bernays, Father of Public Relations
Does this guy and a few of the others seem like actors? I think this video is fake.
After the collisions of the North and South towers, you are WRONG. The aircraft seriously weakened the central support system(s) while jet fuel ravaged six simultaneous floors that upon collision ignited further impairing the same support structures WHILE the active/passive fire control systems were ineffective.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
How'd you get him to bozo you?
Run a 4um search of my posts to BOHICAroo recently and you'll find the path to true liberty...
See, that little how too get on the bozo list book would be a big seller. : )
"The conscious and intelligent manipulation of the organized habits and opinions of the masses is an important element in democratic society. Those who manipulate this unseen mechanism of society constitute an invisible government which is the true ruling power of our country. ... We are governed, our minds are molded, our tastes formed, our ideas suggested, largely by men we have never heard of." Edward Bernays, Father of Public Relations
It wasn't until after the towers collided that I was wrong.
As to free-fall, I mean it didn't free-fall from top to bottom. WTC7 met "we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
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The relationship between morality and liberty is a directly proportional one.
Please explain.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
see what you've done, you made bucky cry like a little school girl; again!
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The relationship between morality and liberty is a directly proportional one.
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The relationship between morality and liberty is a directly proportional one.
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The relationship between morality and liberty is a directly proportional one.
I see where you are going. And WTC7 went fast. But that doesn't mean controlled demolition (CD) was used by anyone. So explain your position that CD was used.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
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The relationship between morality and liberty is a directly proportional one.
bucky read this out loud for all to hear. deleted
The relationship between morality and liberty is a directly proportional one.
Operation Northwoods? Gulf of Tonkin? Sinking of the USS Maine? Agent Orange? Depleted Uranium? The US government didn't kill enough of her own people through duplicity in all or any of the aforementioned to at least warrant some questioning and critical thinking into believing ANY government statement? If the US had nothing to hide, it wouldn't have strong armed any and all investigation into 911--beginning with failure to properly fund one and going on to outright failure to comply with any and all information requests necessary to even look into this matter of killing 3000 citizens.
"The conscious and intelligent manipulation of the organized habits and opinions of the masses is an important element in democratic society. Those who manipulate this unseen mechanism of society constitute an invisible government which is the true ruling power of our country. ... We are governed, our minds are molded, our tastes formed, our ideas suggested, largely by men we have never heard of." Edward Bernays, Father of Public Relations
Questions for you: 1) Was WTC7 structurally damaged as a result of the twin towers collapse? 2) Were fires within the WTC7 building raving all day as a result of the twin towers collapse?
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
Got link?
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
Hold on there pardner! WHOA! Have you read that document at anytime? You cited an entire document as a reference. That is not a refutation. It is an evasion. Cite where in the report your refutation comes from - page and paragraph(s). My reading habits are not the question. You attempted to evade the point and I am not going to let you.
"One of the least understood strategies of the world revolution now moving rapidly toward its goal is the use of mind control as a major means of obtaining the consent of the people who will be subjects of the New World Order." K.M. Heaton, The National Educator
now correct me if I'm wrong but wasn't the upper building mass sitting on top of the lower building mass from the day the building was completed and resisted falling all those years up to 9-11-01?
Two ways, 1) fire damage throughout the day and 2) structural damage.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
And I am not evading you or anyone. That is why I chose to initiate a thread with the title banner you see.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
Sheesh, Buck. Building Seven was the LEAST damaged of the surrounding buldings. Buildings 3,4,5, and 6 were in far worse shape and NONE FELL DOWN until the planned demolition day for each one. No, the fires WERE NOT RAGING ALL DAY. The first tower fell into it's own footprint after burning less than two hours........the other one, the one hit first, burned for four hours prior to collapse. That's not even a quarter of a day. Plus, the fires raged only for moments as the JET FUEL BURNED UP IN AN OXYGEN RICH ENVIRONMENT. It wasn't a forge.......it was open air.
"The conscious and intelligent manipulation of the organized habits and opinions of the masses is an important element in democratic society. Those who manipulate this unseen mechanism of society constitute an invisible government which is the true ruling power of our country. ... We are governed, our minds are molded, our tastes formed, our ideas suggested, largely by men we have never heard of." Edward Bernays, Father of Public Relations
scroll up to Farmfriend's post number 45 she posted it to you. dang! you members of the liar movement want everything handed to you just like the official fairy tale talking points the government provides you with.
When did WTC7 fall? Hours after the twin towers collapsed. Through that entire period of time, fires were observed increasing on many of the floors. Meanwhile there was no method to contain or control those same fires as the fire sprinkler system was non-performing.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
another item of note is that the investigators looking into the collapse of building seven were denied access to the pile of rubble that once was building seven and were instead taken to building six and told to use it as reference to building sevens collapse. this could be why the so called 9-11 commission completely ignored the collapse of building seven in their report, maybe they weren't willing to stick their collective necks out that far as to report on an investigation that never took place.
Her post is confusing because the activities described was AFTER the first tower collapsed. If so, there would be pandemonium everywhere.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
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The relationship between morality and liberty is a directly proportional one.
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The relationship between morality and liberty is a directly proportional one.
bahala na mas tangah.
Thank you BUT I am hoping to see some data beyond any beliefs. Is there any HARD evidence that WTC7 (or for that matter the twins) that clearly identifies CD?
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
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The relationship between morality and liberty is a directly proportional one.
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The relationship between morality and liberty is a directly proportional one.
Barry Jennings, a key 9/11 eyewitness who was an emergency coordinator for the New York Housing Authority, passed away last August 2008 at age 53 from undisclosed circumstances. Mr. Jennings was an eyewitness to the devastation of the World Trade center towers on September 11th 2001. On the morning of 911 Barry Jennings with Michael Hess, (one of Rudy Giuliani’s highest ranking appointed officials, New York city’s corporation counsel), entered the famed Building 7. I highlighted her point.
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
So refute the official reports and show that CD was used. If you can't, then fine ... enjoy your belief system.....
"we ought to lay off the criticism" -- Pinguinite, circa 2010-05-26 22:17:22 ET
Fires alone have NEVER brought a 47 story building down Buck. NEVER. One in China burned for 47 hours and still didn't fall. There was no jet fuel in that building. No plane hit that building. The surrounding buildings had MORE FIRE and MORE DAMAGE, yet didn't fall. But you know what those other buildings DIDN'T HAVE? They didn't have THOUSANDS OF SEC files against corporations, didn't have CIA files, didn't have FBI files. What a winfall that building seven fell into it's own foot print and not those other buildings that didn't contain such IMPORTANT and COSTLY case files but had FAR MORE DAMAGE. Do explain why those fire sprinklers conveniently didn't work in the building that was the COMMAND CENTER for attacks, wherein Guiliani was supposed to be barking orders, but mysteriously didn't set foot in seven all day.
"The conscious and intelligent manipulation of the organized habits and opinions of the masses is an important element in democratic society. Those who manipulate this unseen mechanism of society constitute an invisible government which is the true ruling power of our country. ... We are governed, our minds are molded, our tastes formed, our ideas suggested, largely by men we have never heard of." Edward Bernays, Father of Public Relations
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#67. To: bush_is_a_moonie (#64)
#68. To: wudidiz, AGAviator (#65)
#69. To: *9-11*, AGAviator, all (#34)
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"So, now I am a liar, a lamebrain and a dimwit." -- buckeroo, circa 2010-07-16 20:04:00 ET
#70. To: wudidiz (#65)
The structural integrity was there.
#71. To: Rotara (#70)
"So, now I am a liar, a lamebrain and a dimwit." -- buckeroo, circa 2010-07-16 20:04:00 ET
#72. To: wudidiz (#71)
"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 
#73. To: Rotara (#72)
#74. To: Rotara (#70)
After the collisions of the North and South towers, you are WRONG.
"So, now I am a liar, a lamebrain and a dimwit." -- buckeroo, circa 2010-07-16 20:04:00 ET
#75. To: Lod, Eric Stratton (#74)
(Edited)
less resistance increasing acceleration because of the accumulative mass from the upper floors on the lower floors.
#76. To: buckeroo (#75)
#77. To: Eric Stratton (#76)
#78. To: Rotara, buckeroo (#39)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#79. To: buckeroo (#75)
#80. To: buckeroo (#77)
#81. To: buckeroo (#77)
#82. To: Eric Stratton (#79)
#83. To: buckeroo (#82)
#84. To: buckeroo (#47)
At that point he made some phone calls, and an un-named individual told them to “leave, and leave right away”. Jennings and Hess then proceeded to the stairs, and made it to level 6, when there was an explosion, and the stairwell collapsed from under their feet, Mr. Jennings was actually hanging, and had to climb back up. They made it back up to level 8, where Barry Jennings had a view of the twin towers, both buildings were still standing. This is an important detail, as many debunkers have used Mr. Jennings statements out of context to claim the damage came to WTC 7 from the towers collapsing, not the case according, to Mr. Jennings.
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#85. To: buckeroo (#82)
#86. To: buckeroo (#67)
But I don't believe for a second that a government entity in the USA would knowingly perpetrate an act against the people.
#87. To: Eric Stratton (#83)
#88. To: IRTorqued (#84)
Jennings and Hess then proceeded to the stairs, and made it to level 6, when there was an explosion, and the stairwell collapsed from under their feet, Mr. Jennings was actually hanging, and had to climb back up. They made it back up to level 8, where Barry Jennings had a view of the twin towers, both buildings were still standing.
#89. To: buckeroo (#60)
Cite your specific reference - not the totality of a multi-thousand page report.
#90. To: Eric Stratton (#76)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#91. To: Original_Intent (#89)
#92. To: Original_Intent (#89)
You attempted to evade the point and I am not going to let you.
#93. To: buckeroo (#87)
1) Was WTC7 structurally damaged as a result of the twin towers collapse? 2) Were fires within the WTC7 building raving all day as a result of the twin towers collapse?
#94. To: buckeroo (#88)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#95. To: abraxas (#93)
Building Seven was the LEAST damaged of the surrounding buldings.
#96. To: abraxas (#93)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#97. To: IRTorqued (#94)
scroll up to Farmfriend's post number 45 she posted it to you.
#98. To: buckeroo (#87)
#99. To: IRTorqued (#90)
#100. To: buckeroo (#97)
computer counted ballots are ballots that have been counted in secret, and with all probability not the way one voted.
#101. To: Eric Stratton (#98)
#102. To: buckeroo (#101)
#103. To: buckeroo, All (#101)
#104. To: IRTorqued (#100)
#105. To: Eric Stratton (#102)
#106. To: buckeroo (#95)
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