One of the innovations of the world trade center was supporting much of the mass with the external structure of the buildings.
When the floor support sagged, it pulled in on the external structure weakening it.
Supporting structural loads via the exterior walls was one of the core engineering innovations of the original Twin Towers.
Designed by architect Minoru Yamasaki and structural engineers Leslie Robertson and John Skilling, the World Trade Center towers utilized an advanced "framed-tube" system. This marked a radical shift from traditional skyscraper construction, where internal columns bore the vast majority of the weight.
Scott says the president will be seen and heard by fewer people. But which fewer people? The viewership of these outlets are people who don't like Trump and are against anything he does. They can't be moved off of their opinion of Trump. As Trump has said, if he came up with a cure for cancer they would still be against him. Not a great loss to have them out of the loop.
Apparently you don't know very much about what happened. Little of the fireproofing was asbestos. (Apparently neither does Mandami) Ask the internet, GROK, Gemini, etc. "Did the plane impacts remove the asbestos from the structural steel in the towers"
Here's what you get:
"Yes, the kinetic impact of the aircraft and the broad blast of high-velocity debris stripped the spray-applied fireproofing directly off the structural steel in and around the impact zones.
However, very little (if any) of that stripped material was actually asbestos.
1. Most Impacted Steel Used Mineral Wool, Not Asbestos
Asbestos Bans during Construction: During original construction in April 1970, New York City banned spray-applied asbestos fireproofing. Asbestos-containing insulation (specifically Monokote MK-3, which was ~20% asbestos) had only been applied up to roughly the 38th to 40th floors of the North Tower (WTC 1) and was not used on the structural steel or floor trusses of the South Tower (WTC 2) at all.
@deplorable1971@JFK_PascalNaja7 The buildings were built to withstand an airplane impact, which they did.
The impacts removed the fire protection from the steel, making them susceptible to the fire.
I don't listen to communists.
@deplorable1971@JFK_PascalNaja7 Not a troll account. I actually research what I'm saying before I post. I verify sources,too.
Do you know how to do research, or only how to post comments on X?
3 of the 4 pilots only experience in flying big jets was only in simulators.
The fourth, the most experienced, Hani Hanjour:
After earning his license, Hanjour returned home and applied for a civil aviation job with Saudi Arabian Airlines, but he was rejected by a commercial flight school in Jeddah.
Frustrated by his inability to land a commercial flying job, he turned toward radical Islamic ideology and traveled to Afghanistan in 2000. Because he was already an FAA-certified commercial pilot, al-Qaeda leadership selected him directly for the 9/11 plot.
Instructors' Assessment of His Ability:
Despite logging upwards of 600 total flight hours according to his logbook:
Marginal Flying Skills: Instructors at JetTech noted that his aviation knowledge was weak, particularly regarding basic jet systems and instrument procedures.
@deplorable1971@JFK_PascalNaja7 I didn't say it burnt for an hour, the remaining percentage was consumed in 10 minutes. The sustained burning was from items in the office.
This info is from studies by the NIST, National Institute of Standards and Technology.
And what investigation did you do?
I DID do investigation (I'm a physicist, since credentials are important to you):
The kinetic energy of the aircraft impacts was 2.9 and 3.5 Gigajoules(GJ) for the first and second plane respectively.
The roughly 10,000 gallons of fuel in each plane had 1,000 GJ of energy.
30% of the fuel was consumed instantly in the initial fireball. The remaining fuel burned in 10 to 15 minutes.
This started the office contents on fire which burned until the collapse. North tower had 6 floors burning with energy of 5,000 to 8000 GJ. South tower had 4 floors burning with energy of 3,000 to 4,000 GJ.
At 600° C, structural steel loses 50% of it's strength. At 800°, it loses 90% of it's strength .
It takes 28.4 GJ to raise 100 metric tons of steel to 600° C. The fire was burning at 800-1000°C.
So there was about 5,000 GJ of energy to heat up the steel. That amount of energy could raise over 17,000 tons of steel to 600°C.
I watched the videos of the planes crashing into the towers.
I also watched the collapse of both towers. Both collapses started at the floors where the planes impacted. Please go to YouTube and watch the collapses.
If there were charges planted beforehand to take the buildings down, they would have to know where the planes were going to impact, doubtful very inexperienced pilots could do that. Also, the plane impact and fire would have detonated the charges and the buildings collapse immediately.
OSINT - I wouldn't trust you to do any structural engineering!
@doyve77@JFK_PascalNaja7 Did you not see the picture of the exterior of the tower from the first plane which clearly showed a hole with the outline of the plane including and fuselage?
The NIST says 30% of the fuel was consumed in the initial fireball. The other 2/3 took 10 or 15 minutes to burn and started all the office contents on fire.
The office contents were what sustained the fire. This burned at 800-1000° C, and got steel beams over 600° which is where steel softens. At 600°, it loses 50% of it's strength, at 800°, it loses 90%.
I received a degree in Geophysics from the university in my state. The geology department was one of the top in the nation.
With in state tuition, I graduated with no student debt. Three weeks later I started my very interesting new career in a major company with excellent pay and benefits.
So college can be useful. However, I would say this - college wastes many credit hours forcing you to take classes of no value to your chosen profession. The courses I was forced to take in foreign language, fine arts, literature, and government were of little value to me. There were classes in geoscience that I wanted to take but couldn't because of the required (non geoscience) classes, and I didn't want to become a professional student.
My theory is they make you take these classes because those departments would not have enough support to exist if not required.
I agree with Elon that you can learn almost anything online. But there are a couple of obstacles.
1. You need to know a framework of subjects to learn for your profession.
2. To learn some of the subjects requires specialized, expensive equipment. (An example in geology is optical mineraology when you need an expensive microscope and thin sections).
I was curious so I asked GROK: "If you were to help a person to become a geologist without going to college, what topics would you have them study."
The list it came up with were the required classes for my degree.
What it didn't list were the classes in math, physics, and statistics that are essential for understanding the geology and Geophysics classes.
It will put drivers out of work and it shifts where and what the jobs are.
Now the jobs will shift to Remote Assistance, fleet technicians, maintenance specialists, Depot / Fleet Operations and Field Support Staff, data reviewers for all the sensor data collected, Software, robotics, AI/ML, and hardware engineers.
These jobs will be higher skilled and higher pay. But the writing is on the wall - if you are in a low skill job your job is at risk.
You'll need to get training in one of the human jobs required to support AI infrastructure like robotaxis.
Good reasons to wear a hat if you are bald other than being embarrassed:
1. Wearing a hat if you are bald significantly reduces your risk of skin cancer on your scalp and surrounding areas.
2. Keeps your head warm when it's cold out.
3. For those of you insulting Tim for being bald, he has some good fellow baldies:
Dwayne "The Rock" Johnson
Sir Patrick Stewart
Jason Statham
Bruce Willis
Michael Jordan
Shaquille O'Neal
Winston Churchill
Mahatma Gandhi
Dwight D. Eisenhower
Jeff Bezos
Steve Ballmer
4. His 5.5 million followers don't seem to mind the hat.
@ButlerLonney@sierraton007 Oops!
Facts:
The cross-border movement of businesses between the U.S. and Canada is heavily one-sided, with far more Canadian companies shifting operations, capital, or headquarters to the U.S. than American companies moving to Canada.
(Look it up- please!)
Careful there Butler:
Approximately 65% of Canada's GDP depends on trade, primarily the US (70% of Canada trade is to US)
Are you telling the hand that feeds you to GFY?
Only 27% of US GDP depends on trade (Only 14% to Canada).
US GDP $28 trillion
Canada GDP $2 trillion
US patents granted annually: 160,000
Canadian patents granted: 10.000
US patents per million citizens: 1500
Canadian patents per million citizens: 650
X that you are using to whine about the US on was developed in the US.
The internet that you are using X on was developed in the US.
NATO that Canada depends on for defense:
US contribution: 65%
Canada contribution: 1.5%