9/11 Conspiracy Revealed (for Dummies)

[crims]

Here's a very simple argument that shows 9/11 was a coverup:


First, look at the times:

9:59 AM - South Tower collapses.
10:28 AM - North Tower collapses.
5:30 PM - WTC7 collapses.



Now try to find the cause for WTC7's collapse:

No planes crashed into WTC7.
WTC7 collapsed 7 hours after the towers.
So a plane could not be the cause.

WTC7 had beams and columns of steel.
Steel loses integrity at > 1000*C.
Aviation fuel burns at < 500*C.
So a fire could not be the cause.



Conclusions:

Cause was not fire, and not a plane.
That means WTC7 collapsed by other means.



That's enough evidence to:

1.) Disprove the official theory
2.) Justify a new investigation

 

[cherokee]

Here's a very simple argument that shows 9/11 was a coverup:

My god here we go again....:roll:

 

[Sir_Alec]

It never ends becuase no one knows what happened. Maybe the gov't could give us some more information seeing how the stuff we got right after 9/11 was full of holes.

 

[crims]

Maybe the gov't could give us some more information seeing how the stuff we got right after 9/11 was full of holes.

I have to add:

- FEMA was forbidden to mention demolition in their explanation (they were verboten)
- FEMA admitted that official explanation "only a low probability of occurrence."
- FEMA said the examined steel had rapid "sulfidation" and "oxidation"; (sulfur is used in explosives and burning it produces sulfur-dioxide)

 

[Calm2Chaos]

Here's a very simple argument that shows 9/11 was a coverup:


First, look at the times:

9:59 AM - South Tower collapses.
10:28 AM - North Tower collapses.
5:30 PM - WTC7 collapses.



Now try to find the cause for WTC7's collapse:

No planes crashed into WTC7.
WTC7 collapsed 7 hours after the towers.
So a plane could not be the cause.

WTC7 had beams and columns of steel.
Steel loses integrity at > 1000*C.
Aviation fuel burns at < 500*C.
So a fire could not be the cause.



Conclusions:

Cause was not fire, and not a plane.
That means WTC7 collapsed by other means.



That's enough evidence to:

1.) Disprove the official theory
2.) Justify a new investigation

**STEP AWAY FROM THE SHROOMS**

**THE MOTHERSHIP HAS NOT LANDED**

**YOU DO NOT KNOW MORE THEN ANYBODY ELSE IN THE COUNTRY OR WORLD ABOUT 9/11**

**RELEASE THE TENSION DEVICE ON YOUR HEAD HOLDING THE HAT MADE OF TIN FOIL**

Question: How do you account for the families of the people on the plane. Or was the plane taken over and flown remotely into the buildings. All the while the crew and passengers were kept incompacitated by an oderless tasteless gas leaked into the cabin compartment prior to the attack. Then a digital voice creator mimicked the voices of several passengers to family members via cell phones to strengthen the illusion. Numerous cell phones were cloned and used for this purpose. Upon impact the buildings were detonated with the C4 "the society of sneaky underhanded things" had placed in there the night before. Luckily no one noticed the c4, wires, detonating cords, and fuses. There was also 100's of barrels of extra jet fuel "hidden throughout the building....WOW your right .. it is possible.


By the way were did you get the information on the burn temp of jet fuel?

As mush as I hate doing this.. But I can help myself. No one said the steel melted. It was however severly heated which inturn greatly reduced it's strucual integrity allowing it to sag inward. This lack of support between the walls and floors allowed the walls to also sag inward which allowed the building to collapse in on itself.

I knew I would hate myself after typing that :roll:

 

[crims]

How do you account for the families of the people on the plane.

They're DEAD. The Man capped them in the head.

*Blam! Blam!*

It was however severly heated which inturn greatly reduced it's strucual integrity allowing it to sag inward. This lack of support between the walls and floors allowed the walls to also sag inward which allowed the building to collapse in on itself.

There are some problems with the idea that sagging caused the collapse. For example, consider WTC7:

- no plane hit WTC7 (building 7 in the picture below)
- its fire was too small
- nothing there could've reached temperatures to melt steel
- its steel was fireproof insulated
- it collapsed by freefall (first 100 meters in 4.5 seconds)
- it collapsed suddenly and totally (instead of portions breaking)
- WTC5 and WTC6 had raging fires but did not collapse despite much thinner steel beams
- no steel building ever collapsed from fire (except WTC's)
- FEMA was forbidden to mention demolition in their explanation (they were verboten)
- FEMA admitted that official explanation "only a low probability of occurrence."
- FEMA said the examined steel had rapid "sulfidation" and "oxidation"; (sulfur is used in explosives and burning it produces sulfur-dioxide)

So, by Ockham's Razor, by Laws of Physics, and by Common Sense, fire couldn't be the cause.

Better explanation is that a controlled demolition created an implosion in the lower floors, collapsing the entire building.

 

[cnredd]

Hey crims...do us a favor...

Read this thread here...

Then read this whopping thread here...

As you will see, this topic has been discussed Ad Nauseum...

Go through those threads and see if you have anything new to add...

If not, then there's no need to rehash arguments which have already been discussed over and over and over again...

 

[Missouri Mule]

Anyone believing 9/11 was an American conspiracy should get their anti-psychotic medications refilled. Sheer nonsense.

 

[Captain America]

Anyone believing 9/11 was an American conspiracy should get their anti-psychotic medications refilled. Sheer nonsense.

Roger that. I heard if they moved to Canada, they could get them cheaper. Another good argument for socialist healthcare. :2wave:

'sup B-dog?

 

[crims]

Read this thread here...

Then read this whopping thread here...

I read them... they didn't mention the things I did (especially the FEMA part).

 

[Missouri Mule]

Roger that. I heard if they moved to Canada, they could get them cheaper. Another good argument for socialist healthcare. :2wave:

'sup B-dog?

Boogiedog has passed on to the big doghouse in the sky.

 

[Sir_Alec]

Anyone believing 9/11 was an American conspiracy should get their anti-psychotic medications refilled. Sheer nonsense.

Do some research before you say stuff. A smart person would do the research and post an argument worthy of being read, but you're too lazy to do that. Instead you just say that anyone even looking into the conspiracy is a nut case. Just stop typing and go away.

 

[Missouri Mule]

Do some research before you say stuff. A smart person would do the research and post an argument worthy of being read, but you're too lazy to do that. Instead you just say that anyone even looking into the conspiracy is a nut case. Just stop typing and go away.

Some things are self-evident. It is not necessary to research nonsense. I recommend Risperdal.

http://www.risperdal.com/

 

[crims]

I recommend Risperdal.
http://www.risperdal.com/

Let's see...

The most common side effects ... are: sleepiness, muscle stiffness, restlessness, tremor, indigestion, nausea, abnormal vision, muscle aches, dizziness, runny nose, diarrhea, increased saliva, stomach pain, and urinary incontinence. ... anxiety, sleepiness, restlessness, tremors, and muscle stiffness; dizziness, constipation, nausea, indigestion, runny nose, rash and rapid heartbeat.

Great! So now instead of paranoia, I'll just be a sleep-deprived narcoleptic saliva-puking pant-crapping hallucinating handicap bed-wetter?

Constipation... diarrhea... so I can't crap when I want it to, but it comes out the rest of the time? Even during sleep?

 

[teacher]

I read them... they didn't mention the things I did (especially the FEMA part).

Oh...fresh meat.

Obviously you did not read them because in the "9/11 was an inside job" thread I debunk everything you claim, in detail, with science and facts. Now you can go there and see just how much you don't know and how little you comprehend the science of this or you can keep making goofy claims here and eventually I'll be forced to come here and destroy you in person. And if you had read that thread you would have seen where I challange all comers to find one flaw in the 100,000 plus words I've posted there. If you had read it then you can't find a flaw and decided to come here with weak bullshit. Some in my first post to you I've deduced you are either lying or fleeing from true debate in the face of a superior advesary. Which is it?

Since you seem extra obnoxious I'll give you a little taste.

Steel loses integrity at &gt; 1000*C.
Aviation fuel burns at &lt; 500*C.
So a fire could not be the cause.

Steel loses integrity at 1000 F.
Aviation fuel started a structure fire. Average structure fires (house)temps can go above 1800 F. at ceiling height.

Not the best of starts for you. See how I take your core belief and shatter it? Please tell me you haven't made all your deductions depending on incorrect facts. I myself go into some very logical deductive reasoning in the WTC #7 topic.

So what's it gonna be? You gonna go read and learn and bow gracefully out much better informed, or do you want some of me?

I'm thinking it might be time for a little "Class in Session." Haven't had one of those long time. The kids enjoy those.

I'm sorry crims, I haven't introduced myself...

I'm teacher, of the Colossal Brain, Lord and Master of all I Survey, DP's most Favorite Asshole and most Creative Poster, CIC of the Monkey Army, God of Smack, Champion of Copy/Paste, Holder of Billo's Leash, the Perfect Libertarian, Rememberer of Stuff, Basement Warden, Scourage of Paris, Knower of all Things, Distributer of the Basement VIP Lounge Keys, Spreader of the Contagion, a Snappy Dresser, Holder of the Fortune Teller, Grand Poobah of Debate Politics.

And I really, really don't like people who claim my country did this.

 

[teacher]

They're DEAD. The Man capped them in the head.

*Blam! Blam!*

Now you really have my attention. I'm going to break you.

- no plane hit WTC7 (building 7 in the picture below)

Flying debrie?

- its fire was too small

You have determined that how?

- nothing there could've reached temperatures to melt steel

Nobody with a lick of sence has ever said that the steel melted.
-

its steel was fireproof insulated

There is no such thing as fireproofing. There is fire retardent which has a fire rating. That is a certain temperature for a certain time. WTC #7 burned for 7 hours.

- it collapsed by freefall (first 100 meters in 4.5 seconds)

Oh my friggin God. You're one of those guys?

- it collapsed suddenly and totally (instead of portions breaking)

You need to familiarize yourself with the unique counterlever construction of WTC #7 that led to it's demise.

- WTC5 and WTC6 had raging fires but did not collapse despite much thinner steel beams

The towers didn't collapse?

- no steel building ever collapsed from fire (except WTC's)

No steel building had ever been constructed like the towers or had so much stucture even before a fire destoyed by planes flying into the friggin building.

- FEMA was forbidden to mention demolition in their explanation (they were verboten)
- FEMA admitted that official explanation "only a low probability of occurrence."
- FEMA said the examined steel had rapid "sulfidation" and "oxidation"; (sulfur is used in explosives and burning it produces sulfur-dioxide)

Been reading conspiracy web sites and now you think you know it all junior? There is more solid info in my words in the 9/11 thread than you will find in the FEMA report. Pretty much the deal is I'm smarter than they are. get used to it. It's not a bad thing.

So, by Ockham's Razor, by Laws of Physics, and by Common Sense, fire couldn't be the cause.

Better explanation is that a controlled demolition created an implosion in the lower floors, collapsing the entire building.

So here's how it's gonna go with you and me if you dare stay. You're gonna read my words and then run and look for a comeback on your little sites and then finally give that up and just ignore what points of yours I have destroyed and come back with some new bullshit that I will destroy and then the cycle will repeat until you run out of bullshit at which point you will either go on to the next site with your swill or post somewhere else in this site hoping I don't come find you just like Sir Alec does.

You really shouldn't have done that *Blam!Blam!* thing. I know more about this than all your bullshit websites combined. You should test the waters before you dive in.

Save us all the trouble, go read and understand the "9/11 was an inside job" thread and go away.

 

[teacher]

This should be good...

 

[jfuh]

- no steel building ever collapsed from fire (except WTC's)
- FEMA was forbidden to mention demolition in their explanation (they were verboten)
- FEMA admitted that official explanation "only a low probability of occurrence."
- FEMA said the examined steel had rapid "sulfidation" and "oxidation"; (sulfur is used in explosives and burning it produces sulfur-dioxide)

Since you bring up these Here's your explaination into them
1) No other 100 story building had ever been struck by a 757 loaded with fuel before.
2) THat would be logical because mentioning demolition would indeed spark the controversy of a conspiracy.
3) I'd have to see a credible source for this one.
4) This is very very very simple. Sulfur is abundant in many polymers as well as a variety of cleaning agents, and finally, sulfur is also found in jet fuel. Jet fuel "melts" (weaken would be a better term) steel beams, hmmm sulfer in steel beams.

 

[crims]

To American patriot, defender of liberty, protector of the weak, all-around good guy:

I'm teacher, of the Colossal Brain, Lord and Master of all I Survey, DP's most Favorite Asshole and most Creative Poster, CIC of the Monkey Army, God of Smack, Champion of Copy/Paste, Holder of Billo's Leash, the Perfect Libertarian, Rememberer of Stuff, Basement Warden, Scourage of Paris, Knower of all Things, Distributer of the Basement VIP Lounge Keys, Spreader of the Contagion, a Snappy Dresser, Holder of the Fortune Teller, Grand Poobah of Debate Politics.

I'm an agent from a secret soviet intelligence network. Burn! :lol:

Here are some comrades from my unit:

http://www.itsallpolitics.com/9-11-conspiracy-revealed-vt11112.html
http://www.starsiege2845.com/forums/index.php?showtopic=12653
http://www.politicsandcurrentaffairs.co.uk/Forum/viewtopic.php?t=13227
http://www.mapleleafweb.com/forums/index.php?showtopic=5516
http://www.scienceforums.net/forums/showthread.php?t=18608&page=3#52
http://www.politicsforum.org/forum/viewtopic.php?t=56202#847727

And I really, really don't like people who claim my country did this.

Your country has been hijacked by criminals.
They've stolen your rights and freedoms,
they've murdered thousands of your countrymen,
they've sent kids to die in some foresaken war,
and they've gotten rich off of it.

Now would be a good time to do something about it.

Steel loses integrity at 1000 F.
Aviation fuel started a structure fire. Average structure fires (house)temps can go above 1800 F. at ceiling height.

Kevin Ryan (from Underwriters Laboratories, the company that certified steel components used in WTC) sent a letter to Frank Gale at the National Institute of Standards and Technology:

"We know that the components were certified to ASTM E119.
Time-Temperature Curves from this standard required samples to be exposed to temperatures around 2000*F for several hours.
And as we all agree, the steel applied met those specifications.
Additionally, I think we can all agree even un-fireproofed steel will not melt until reaching red-hot temperatures reaching nearly 3000*F."

That's from the people who certified the steel themselves.

Flying debrie?

- WTC5 and WTC6 were much closer to the Twin Towers
- WTC5 and WTC6 had raging fires
- they had much thinner steel beams
- but they did not collapse despite all this
- instead, WTC7 collapsed 7 hours after the Twin Towers

- its fire was too small

You have determined that how?

By comparison.

WTC7 (fell): http://www.saunalahti.fi/wtc2001/wtc7b.JPG
WTC5 (stood): http://911research.wtc7.net/wtc/attack/docs/wtc5_fire_floors.jpg

- it collapsed by freefall (first 100 meters in 4.5 seconds)

Oh my friggin God. You're one of those guys?

Yes, one of them... because I know physics.

d = distance = first 100 meters
a = acceleration = gravity (freefall) = 9.8 m/s/s
t = time to reach 100 meters

d = at^2 / 2
100 = 9.8(t^2) / 2
200 = 9.8(t^2)
20.41 = t^2
squareroot 20.41 = t
4.5 = t

WTC7 fell 100 meters in 4.5 seconds, therefore it was in freefall.

You need to familiarize yourself with the unique counterlever construction of WTC #7 that led to it's demise.

What? The other 76 beams were actually made of chocolate?

- WTC5 and WTC6 had raging fires but did not collapse despite much thinner steel beams

The towers didn't collapse?

American - can you read?

If not, please find an English man.
Ask him to tell you where is "building 5" and "building 6" in this picture:

No steel building had ever been constructed like the towers or had so much stucture even before a fire destoyed by planes flying into the friggin building.

July 28, 1945 - a B-52 bomber lost in the fog crashed into the 79th floor of the Empire State Building.

The Empire State Building was built in 1931. It did not collapse.

And yet the WTC - a modern building, which was designed to withstand an aircraft crash - collapsed.






To jfuh:

3) I'd have to see a credible source for this one.
4) This is very very very simple. Sulfur is abundant in many polymers as well as a variety of cleaning agents, and finally, sulfur is also found in jet fuel. Jet fuel "melts" (weaken would be a better term) steel beams, hmmm sulfer in steel beams.

PHOTOS AND EXPLANATION: http://911research.wtc7.net/wtc/evidence/metallurgy/index.html ------>

The FEMA report titled World Trade Center Building Performance Study, Appendix C ... “Limited Metallurgical Examination”, shows evidence of explosives used, by way of photographs, microscopic, and chemical examination. They do not draw this conclusion though. Instead, the authors write ... “Evidence of a severe high temperature corrosion attack on the steel, including oxidation and sulfidation with subsequent intergranular melting, was readily visible in the near-surface microstructure.”... “The thinning of the steel occurred by high temperature corrosion due to a combination of oxidation and sulfidation.”...

The FEMA report can now be found at http://www.civil.columbia.edu/ce4210/FEMA_403CD/html/open.htm






It's just so ridiculous. Look - here's the OFFICIAL STORY + SOME LOOPHOLES:

Terrorists from Saudi Arabia trained by Osama hijack planes.

One plane crashes into the Pentagon, dissappearing completely, making a tiny hole.
For no reason, FBI then confiscate all 4 known tapes of the Pentagon crash.

Another plane crashes in the middle of nowhere, leaving no remains.

9:59 AM - South Tower collapses to the ground in aproximatly 10 seconds.
10:28 AM - North Tower collapses to the ground in approximatly 10 seconds.
Later, at 5:30 PM - World Trade centre 7 suddenly collapses for no reason.

South Tower was hit last and only by its corner but collapsed FIRST,
while North Tower was hit first and directly at centre but collapsed SECOND.

7 of 8 blackboxes (made of stainless steel and high-temp-insulated silica) are destroyed,
BUT one of the terrorist's passports (made of paper) somehow flew out of his pocket,
out of the burning inferno, on to the streets below, where it was found somehow by FBI amidst all the panic.

Steel leftovers are then rushed out of the country and to the smelters (FEMA got only a little time).

Then US Army invades Afghanistan to hunt for Osama, but gets nowhere.
Then US Army invades Iraq to prevent a WMD attack (even though the invasion gives them all the reason to use the WMD's).

The WMD's are then never found (supposedly suicidal terrorists would rather die in battle and give Bush look stupid than to use WMD's to defend themselves), and everyone forgets about Osama.





Just imagine the conversation they had in Iraq:

SADDAM: "Shiite shiite! The Americans are coming!"
SOME GUY: "Should we use the WMD's to defend ourselves?"
SADDAM: "No, smuggle the WMD's over the border so we have no way of using them."
SOME GUY: "AYE AYE!"
SADDAM: "Buahahah... Bush will look like an idiot for coming here. Stupid infidels!"
SOME GUY: "Allah akbhar! Allah akbhar! Allah akbhar!"

How stupid can a person be? =/

 

[teacher]

To American patriot, defender of liberty, protector of the weak, all-around good guy:

I'm an agent from a secret soviet intelligence network. Burn! :lol:

And I used to be in Military Intelligence. So friggin what. My side won the cold war and your side is trading Vodka in the black market for Levi's. You definately don't want to go there.

Here are some comrades from my unit:

http://www.itsallpolitics.com/9-11-conspiracy-revealed-vt11112.html
http://www.starsiege2845.com/forums/index.php?showtopic=12653
http://www.politicsandcurrentaffairs.co.uk/Forum/viewtopic.php?t=13227
http://www.mapleleafweb.com/forums/index.php?showtopic=5516
http://www.scienceforums.net/forums/showthread.php?t=18608&amp;page=3#52
http://www.politicsforum.org/forum/viewtopic.php?t=56202#847727

So what? Some other sites where you say the same bullshit? Didn't run into me there, did you? You're on this site now.

Your country has been hijacked by criminals.
They've stolen your rights and freedoms,
they've murdered thousands of your countrymen,
they've sent kids to die in some foresaken war,
and they've gotten rich off of it.

Now would be a good time to do something about it.

That's some fine debating there.

Kevin Ryan

Is a hack. He worked for UL but in this context was not representing them. In fact, UL has distanced themselves from him. Now did you not know that or did you choose to omit that?

(from Underwriters Laboratories, the company that certified steel components used in WTC) sent a letter to Frank Gale at the National Institute of Standards and Technology:

"We know that the components were certified to ASTM E119.
Time-Temperature Curves from this standard required samples to be exposed to temperatures around 2000*F for several hours.
And as we all agree, the steel applied met those specifications.
Additionally, I think we can all agree even un-fireproofed steel will not melt until reaching red-hot temperatures reaching nearly 3000*F."

That's from the people who certified the steel themselves.

I go over this with everyone one of you conspiracy site readers. The steel did not melt. But steel does lose rigidity at a rather low temp. Tell me sport, among many things, I'm a welder and steel fabricator. I know more about steel than you ever will. You read a site. I can tell by the color of it when I'm cutting it. Kevin Ryan worked for UL. That's all. I know more than him. You point to other people, I'll tell you facts. See how this works comrade?

- WTC5 and WTC6 were much closer to the Twin Towers
- WTC5 and WTC6 had raging fires
- they had much thinner steel beams
- but they did not collapse despite all this
- instead, WTC7 collapsed 7 hours after the Twin Towers

So this tells me that you don't have a friggin clue to the difference in the strutures that led to the collapse of some and not others.

Yes, one of them... because I know physics.

d = distance = first 100 meters
a = acceleration = gravity (freefall) = 9.8 m/s/s
t = time to reach 100 meters

d = at^2 / 2
100 = 9.8(t^2) / 2
200 = 9.8(t^2)
20.41 = t^2
squareroot 20.41 = t
4.5 = t

WTC7 fell 100 meters in 4.5 seconds, therefore it was in freefall.

Tell me how long a floor slows down the falling mass above it. Didn't think of that part in the friggin equation you read did you? Try like a friggin thousandth

July 28, 1945 - a B-52 bomber lost in the fog crashed into the 79th floor of the Empire State Building.

The Empire State Building was built in 1931. It did not collapse.

The Empire State Building had different construction. You don't know a thing about this except for what you read in your goofy web sites, do you?

And yet the WTC - a modern building, which was designed to withstand an aircraft crash - collapsed.

And it did withstand the crash. Not the ensuing fire with much integrity compromised.

You know slick. I've been here way longer than you. You've allready been told to go read the other threads because it's all been covered. You come riding in here like you know something the rest of us don't when this has been gone over before. You say you have read the other threads when you haven't. So right away we know you lie, you're a know it all, you don't know the construction of the buildings involved, you don't know jack about fire and it's temps, or steel, or suppresion, or retardant.

Sport, just go read my posts in the "9/11 was an inside job" thread in the "War on Terror" forum. I'm done with you. You don't know enough to realize you don't know nothing. So what's the matter sport? Afraid to go to the big thread and face all the music? Go there and read my qualifications. And they are not "I read a web site." While you're there pay attention to all those that have come before you and said the same things as you that all have been destroyed by me. It's just that simple sport. I came to your little dog and pony show. How about you step up to the Big Top?

Man this Warden thing really makes me behave better, don't it? What I didn't say there, man.

 

[jfuh]

To jfuh:
PHOTOS AND EXPLANATION: http://911research.wtc7.net/wtc/evidence/metallurgy/index.html ------>

1) Is there a reason why you edited out my first 2 responses?
2) I asked for a credible source.
3) Just to add another note, sulfur is a component of jet fuel, which is by all accounts indeed an explosive.
4) The point of this being a conspiracy would be? FYI I would probably be the first in line to stone the Bush if he were conspiring. However, 9/11 happened not because of Bush's involvement, but because of his uninvolvement.

 

[jfuh]

The Empire State Building had different construction. You don't know a thing about this except for what you read in your goofy web sites, do you?

Not to mention a much smaller plane that was just about to land (very little fuel), and did not explode. But mainly yes, it was a very different material that was used to construct the empire state rather then that used for the WTC twins, specifically to the exterior materials.

 

[teacher]

Not to mention a much smaller plane that was just about to land (very little fuel), and did not explode. But mainly yes, it was a very different material that was used to construct the empire state rather then that used for the WTC twins, specifically to the exterior materials.

Compromised fire retardant and the failure of the two 5/8" truss to face column bolts. That's why the towers fell.

Not so much different material but that fact that it was laid out different. The Empire State building was over built.

How about I paraphrase a quote by the guy who designed the towers?

"The trick is not in designing a building that can stand up. The trick is designing a building that will just barely stand up."

 

[teacher]

Hey crims, ever heard of the basement?

I left a little something for you down there.

http://www.debatepolitics.com/showpost.php?p=282543&postcount=5

 

[jfuh]

Compromised fire retardant and the failure of the two 5/8" truss to face column bolts. That's why the towers fell.

Not so much different material but that fact that it was laid out different. The Empire State building was over built.

How about I paraphrase a quote by the guy who designed the towers?

"The trick is not in designing a building that can stand up. The trick is designing a building that will just barely stand up."

Yes, I was refering to the lime stone slabs on the exterior of the Empire State building that significantly reduced the inertia of impact. Buildings just aren't built like that anymore.
As for the WTC towers, I think another significant note is to point out the "exo-skeleton" used to construct in order to maximize office spave internally.