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by Architects & Engineers for 9/11 Truth (Page 3)

Slide 358:

A Precedent for "Top Down Demolition"

NIST states that controlled demolitions only start at the bottom.

From the DVD:  "9/11 Mysteries"

Slide 359:

"... the words of a senior blaster:"

"We blow the basement, all the columns in the basement.  Then we crack it up at the top to get it started.  We go every other floor ... all the way down.  Every explosive has a timer on it -- that's why it's 'controlled.'  When the columns go, each floor goes down and impacts the one below, and keeps going." -- Demolitions expert.

Mark Loizeauxis president of a company called Controlled Demolition:

"You don't have to go to the top floor.  You can go almost anywhere in the structure, and given the right circumstances, you can release all of that stored energy, converting it into what's called "kinetic energy."  That's energy in motion.  And that's what brings the building down."

A 3-story top-down controlled demolition:

A 20 story middle-down controlled demolition:

Slides 360, 361 & 362:

WTC -- North Tower

  • Explosions at top

  • Half of the top 15 stories disintegrates in 4 seconds

Slide 363:

"Pile driver" Self-Destructs in 4 Seconds

Note that the 15-story "pile driver" is disintegrating on many floors at once -- reducing itself by 1/2 of its height before the demolition wave starts traveling down the building below the impact zone of the airplane.

Slide 364:

"Unexpected to many of us in terms of how swiftly it happened, they came down."

Slide 365:

Same as Slide 363.

Slide 366:

North Tower Explosions

Note the explosions racing down the facade of the building emitting squibs below.

Slide 367:

Slide 368:

South Tower -- Note multiple independent explosions blowing the mass outside of the building

EuroNews FLASH, World Trade Center, New York

Slide 369:

"The entire building has just collapsed as if a demolition team set off, when you see the old demolitions of these old buildings, it folded down on itself and it is not there anymore."

Slide 370:

The Explosive Demolition Hypothesis

2.  Straight-Down, Symmetrical Progression OUTSIDE Footprint

Slide 371:

FEMA:  Primary Debris Field is 1,200 ft. in Diameter

Everything is blown outside the Towers' footprint

Slide 372:

FEMA:  Primary Debris Field is 1,200 ft. in Diameter

Slide 373:

Debris Filled the Entire WTC Complex and Beyond

The debris field was 20 times the area of the footprint of the two towers.

Slide 374:

3.  Squibs:  Explosive Charges Visible at LOWER FLOORS

Slide 375:

From "Loose Change, Second Edition"

WTC Squibs -- Explosive Ejections

Slide 376:

"In all the videos of the collapses, explosions can be seen bursting from the building 20-30 stories below the demolition wave.







And here."

Slides 377, 378, 379, 380 & 381:

"Squibs" -- at WTC 2

  • Pulverized Building Materials

  • 160 to 200 feet / sec. velocity

  • 20, 40, and 60 stories below

  • Focalized ejections

    • "Piston" effect in elevator hoistways would not create focalized ejections 60 feet away from hoistway

  • Precise locations at middle of building face

    • 60 feet from hoistway!

Slide 382:

Squib Velocities are "Explosive"

Moreover, a "piston effect" from a falling floor pushing air out of the building would tend to have a uniform air pressure and blow out most of the windows on the floors(s)

  • But this could never happen because the squibs are 20 to 40 floors below the "collapsing" building!

  • Squibs occur at precise locations (center of bldg. facade)

  • Squibs occur at speeds (160 to 200 feet per second) that could only be propelled by explosives.

Slide 383:

These WTC 2 Squibs:  126 mph

David Chandler, Physics / Math Teacher

Slide 384:

"As the South Tower begins to explode, we track two squibs near the bottom of the frame.  They shoot out quickly at first, then slow and merge in with the rest of the dust cloud.

Using the first few data points, we see that the first squib shoots out at 44.98 M/sec., or about 100 mph.

Doing the same for the second squib, we get a speed of 56.3 M/sec., which works out closer to 126 mph."

Slide 385:

4.  Near Free-Fall Pace Through Path of Greatest Resistance

Slide 386:

Nearly Free Fall Speed of Collapse

Free-Fall Speed in a vacuum - 9.2 s.

  • The building "collapses" somewhere between 9.5 and 10.5 seconds.

  • The debris hits the ground within 15 seconds

From "Loose Change -- Second Edition"

Slide 387:

"Galileo's Law of Falling Bodies calculates the time in which an object will travel a certain distance in complete free-fall.  Distance (D) = 16.08 X Seconds Squared.  The South Tower was 1,362 feet tall.  1,362 = 16.08 x 85.7 or 9.2 Seconds.

The Twin Towers came down in nearly free-fall speed."

Slide 388:

A 9/11 Story Problem:  Which 15 story building hits the ground first?

  • If the 15 story section is falling at free fall speed ...

    • All of its gravitational potential energy is converted to Kinetic Energy (movement)

    • It is not available to do the work of "crushing" the building below!

    • It would have to slow down in order to do any other work, i.e., "crushing 80,000 tons of structural steel below.

Slide 389:


Slide 390:

Exercise:  Find FEMA's "Pile Driver"

No Piston

No Mass = No Transfer of Momentum

  • Can you find FEMA's "pile driver" in this image or any of the other images of the collapses of the Twin Towers?

  • Even if the "pile driver" is hidden within the dust cloud, it would only have a fraction of the mass of the former top of the building, since the building's mass is being blow outside the building's perimeter, as is confirmed by the ensuing debris field.

Slide 391:

5.  Total Dismemberment of Steel Structure

Slide 392:

WTC -- South Tower:  Gravitational Collapse or Explosive Dismemberment?

Slide 393:

WTC South Tower:  Demolition Waves

Slide 394:

Slide 395:

Slide 396:

WTC South Tower Explodes

Slide 397:

Analysis of Demolition Waves

Slide 398:

  • Watch how even the "collapse" is -- advancing rows of explosions progressing in a perfectly straight line around the building.  Symmetrical progression even though asymetrical damage!

  • There is only dust and smoke where the top of the building use to be.  A great quantity of dust mixed with structural steel is ejected out horizontally at high speed.

  • The demolition wave is clearly advancing ahead of the actual falling structure above.  The delays between demolition charges would have to be very precisely controlled to create this effect.  The detonators on each floor would be synchronously timed to the split second, with control of the sequencing by pre-programmed computer, but remotely started at the floor of the plane impact.

Slide 399:

  • The steel frame structure was almost completely dismembered.

  • Cut up and ready for shipment.

Slide 400:

Does this look like a gravitational collapse??

WTC North Tower Broken Down to Shippable Lengths

Slide 402:

Broken into 37.5' lengths -- Ready for Shipment

Slide 403:

6.  LATERAL EJECTION of Structural Steel Up to 500 ft.

Slide 404:

Lateral Ejection:  Massive Steel Assemblies Hurled 500'

Slide 405

From DVD:  "9/11 Mysteries"

"Now let's look at the collapse of the Twin Towers.  We are seeing explosions rather than implosions, a first in demolition history.  A sequenced rumble becomes a roar as debris is thrown outward.  The damage is not contained.  Even the windows are blown from neighborhood buildings.  What kind of energy enabled this?  A FEMA photographer taking pictures of Ground Zero wondered why so many steel beams were jutting from neighborhood buildings.  What shot pieces of the Towers all the way across the street?"

Slide 406:

Exterior Column Unit Ejected at 55 mph.



What expelled out the walls and office contents in ALL directions, with such force?

Speed:  from 0 to over 50 MPH in 0.09 sec.

Slide 407:

Wall Units at Mechanical Floors Are Expelled the Farthest!

4-Ton Wall Sections in Groups 600 ft. from the Tower Base.

Slide 408:

FEMA:  Primary Debris Field 1,200 ft. Diameter

Slide 409:

The Physics of Lateral Ejections

Slide 410:

David Chandler, Physics / Math Teacher

Slide 411:

"Girders weighing several tons were found 600 feet from the base of the North Tower.  How fast they were ejected depends on where they originated.  If they came from high in the building, they were thrown outwards at about 50 mph.  If they came from lower down, the speed had to be even greater.  Gravity alone cannot account for such high lateral ejection speeds."

Slide 412:

The Physics of Lateral Ejections

David Chandler, Physics / Math Teacher

Slide 413:

"Using special software, we can analyze motion on video clips frame by frame.  I have placed markers on each frame so we can track a particular projectile. 

From the markers we can get a data table and plot various graphs.  The data here shows that the object we are tracking was shot horizontally at over 70 mph.  The energy needed to hurl a 4-ton girder at this speed is comparable to the energy needed to hurl a 200-pound cannonball three miles.

Slide 414:

Enough energy in each WTC ejection to fire a 200 lb. cannon ball 3 miles?

Slide 415:

How about those Pancakes?

Shouldn't there be about 110 stacked floors stacked up somewhere inside?

Slide 416:

Floor Panel Contractor

Reports Floor Panels "Missing"

  • From the book "Men of Steel" by Karl Koch III, Contractor who built the towers, asking Tom Petrizzo, the subcontractor responsible for delivering the 6,000 floor decking and joist panels to the construction site in the early 70's, and who worked on the demolition trucking team: "I didn't see one floor deck come here with a bar joist in it.  They must have disintegrated --- There were 6,000 of them ... There's stuff crumpled up, but go identify it as a floor deck if you can.  I couldn't believe it -- not one floor panel ..."

Slide 417:

Pancake Collapses Leave Pancakes:

Slide 418:

8.  Enormous Pyroclastic Clouds of Pulverized Concrete

Slide 419:

Where is All the Concrete?

  • Answer:  This was clearly NOT a classic demolition.  That is why we have no frame of reference with which to understand it.  However, if we think about it, the shredding of the building and the great area of debris is all the more evidence of explosions.

There are no large chunks of concrete found on the surface at Ground Zero -- only shredded structural steel.

Slide 420:

Pyroclastic Dust Clouds

Jeff King, Doctor / Scientist, MIT

"One of the most significant things to my thinking that indicates that this could not have been the sort of collapse that we are told it was is the presence of the dust clouds.  And, as you've seen in the pictures, and I'm sure all of us have seen probably more than we would like, there were very very large clouds of very thick dust that enveloped the area, that crossed the river, that made it almost all the way to New Jersey from the pictures that I've seen.  This type of flow is something we are familiar with in physics.  It occurs in only two situations that we know of, naturally.  One is in volcanic eruptions, where a large amount of material is suddenly exploded into the air, and basically forms small particles.  The other situation is something called turbidity currents.  These occur along the edges of the continental shelves where mud or sediment will slump and become suspended in water.  And the common thread is you have large amounts of a dense material that is suspended very quickly in a fluid, thereby creating another denser fluid, which is in effect the dust cloud.  And that fluid can achieve considerable velocities.  The problem with creating this sort of slurry of fine particles is that there really is no mechanism that has been proposed.  We have concrete floors with carpeting or flooring over them.  We have furniture.  We have floors that are basically coming together in a collapse.  But the concrete is basically protected under these layers.  Early in the collapse, in the very first moments, we see these thick clouds being ejected at very high speed.  They are clearly dense because they flow downward, and become part of this large overall pyroclastic flow.  What we're basically being told is that concrete sort of jumped up into mid-air and exploded itself, and then was ejected as the floors came together.  Not a very plausible mechanism but I have yet to hear of anything else proposed to explain it.  From quite a few people on the scene we have been told that the powder represented most of the concrete.  That the amount of intact, macroscopic chunks of concrete on the scene were negligible.  Basically, everything was reduced to powder.  And incidentally, we also know that other things besides concrete were reduced to powder.  We know that contents of computers, exotic metals from computer chips, these sorts of things were also identified in the dust and in very small particles, generally on the order of less than 100 microns in diameter.  So we have a real issue of mechanism as far as what in the process of this collapse could cause so many things to be pulverized.

Slide 422:

N.Y. Governor Pataki -- "Pulverized Concrete"

Slide 423:

"And you look and you see there's no concrete.  There's very little concrete.  All you see is a ____."

"What happened to the concrete?"

"The concrete was pulverized.  And I was down here on Tuesday, and it was like you were on a foreign planet.  All of lower Manhattan -- not just this site -- from river to river there was dust, powder, two to three inches thick. The concrete was just pulverized."

Slide 424:

Pulverization of the Concrete

A striking feature of the Twin Towers' destruction was the pulverization of most of the concrete into gravel and dust before it hit the ground.  This is evident from the explosive mushrooming of the towers into vast clouds of concrete as they fell.

Virtually no large pieces of concrete were found at Ground Zero, only twisted pieces of steel.  Estimates put the size of the dust particles in the ten-to-100-micron range -- the width of a human hair.

Slide 425:

[Joe Casaliggi, Engine 7]  "You have two 110-story office buildings -- you don't find a desk, you don't find a chair, you don't find a telephone, a computer. 

The biggest piece of a telephone I found was half of the keypad, and it was about this big. 

The buildings collapsed to dust."

Slide 426:

The Wall of Concrete Clouds Then Traveled Outward Across the River.

Slide 427:

9/11/01 -- A Typical Street in Downtown Manhattan

Mostly unburned paper mixes with the dust of the top half of the Twin Towers.  This is all that is left of the concrete floors, gypsum wall board, steel decking, office furniture, office machinery, filing cabinets.  The dust averages 4" deep.  Most of the 6" curb appears filled in.

Slide 428:

Pyroclastic Dust Clouds

  • 90,000 tons of concrete missing from each building

  • 100-micron to 10-mil particle size

  • Settled 4" thick all over downtown Manhattan

Slide 429:

Dust Cloud Expansion by Heat Can Be Calculated

  • Dust Cloud Expansion Energy Sink Vastly Exceeded Gravitational Energy Source

  • Dust cloud of North Tower expanded to about 5 times the building volume by 30 seconds from collapse start.

  • Heat energy is required to produce expansion:  Ideal gas law:  PV=nRT where: P = pressure, V = Volume, T = absolute temperature

  • The energy for the heat required is about 10x the gravitational potential energy!

    • Energy required for 3.4x expansion in 30 seconds is on the order of 1,500,000 kWH.

    • But the gravitational potential energy was about 110,000 kWH

Slide 430:

Gravitation Potential Energy of 15 Story Upper Section of North Tower = 110,000 KWH

Near free-fall speed of collapse (all of its P.E. is converted to Kinetic → This is all the work that it can do!!

1.  Expansion of Dust Clouds (to 5x building volume in 30 seconds) → Massive heat-Energy required

2.  Creation of tons of molten metal → 4,000 heat source?

3.  Crush 80,000 tons of structural steel frame → At near free-fall speed?

4.  Pulverization of 90,000 tons of concrete to fine dust → And where is the "grinder"?

Slide 431:

Massive Pulverization

Lt. Kenneth Christiansen, Ladder Company 5, Greenwich Village

"What I expected to see was nothing like what I actually did see at the time of my arrival at the site. 

There wasn't much that you could say, that you could describe.  Everything was dust and metal.  There was no typewriters, no chairs.  There was no nothing."

Slide 433:

The Only File Cabinet Found

  • Of the hundreds of thousands of file cabinets in the Towers, only this one in the basement was found!

Slide 434:


Slide 435:

Pulverization of WTC Victims

  • More than 700 bone fragments, each less than a half an inch long, have now been found on top of the 40-story Deutsche Bank building across the street from the South Tower.

  • How did they get there? How did they get so small?

Slide 436:

In April, 2006, New Yorkers were distressed to learn that bone fragments, human remains from 9/11, had been found on the roof of the nearby Deutsche Bank Building.

"And how, in God's name, did those fragments get there?"

"It surprised me that there were still bone fragments or human remains that had not been discovered."

"How is it possible, that after five years, they are finally looking on the rooftops of the Deutsche building.  I mean, that's crazy!"

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