15 years passed ever since the incident took place in New York City.
A small number of researchers did not stop questioning the theory that the Twin Towers collapsed due to severe fires and high temperatures resulting from the two conducted terrorist plane crashes.
But, most of these ideas were mostly classified as unrealistic conspiracy theories.
On the other hand, now, a report made by four experts in the physics community published by Europhysics Magazine informs that “the evidence points overwhelmingly to the conclusion that all three buildings were destroyed by controlled demolition.”
Also, “given the far-reaching implications, it is morally imperative that this hypothesis be the subject of a truly scientific and impartial investigation by responsible authorities,” is the conclusion reached by the four physicists.
Four experts conducted the study. Steven Jones, former physics professor at Brigham Young University and Anthony Szamboti, a mechanical design engineer with an experience of over 25 years of experience in aerospace and communications industries are only two of these members; in addition, we also mention Robert Korol, emeritus professor of civil engineering at McMaster University and Ted Walter, who works for Architects & Engineers for 9/11 Truth, a non-profit organization that represents more than 2500 experts.
But, taking in consideration its controversial nature, Europhysics did add an editor note of the study within the issue from September 2016: “This feature is somewhat different from our usual purely scientific articles, in that it contains some speculation.
However, given the timing and the importance of the issue, we consider that this feature is sufficiently technical and interesting to merit publication for our readers. Obviously, the content of this article is the responsibility of the authors.”
Around August 2002, the National Institute of Standards and Technology put in motion an exploration of the collapse of the three buildings that occurred on 9/11. It lasted six years.
As a result, researchers discovered that the Twin Towers as well as the World Trade Center Building 7, which had not been struck by an airplane, all fell apart due to the intense fires and heat. However, NIST later uncovered that “the only known cases of total structural collapse in high-rise buildings where fires played a significant role.”
“It bears repeating that fires have never caused the total collapse of a steel-framed high-rise before or since 9/11,” the researchers write. “Did we witness an unprecedented event three separate times on September 11, 2001?”
First of all, the report did conclude “Given the far-reaching implications, it is morally imperative that this hypothesis be the subject of a truly scientific and impartial investigation by responsible authorities.”
Secondly, researchers also discovered that “the only phenomenon capable of collapsing such buildings completely has been by way of a procedure known as controlled demolition, whereby explosives or other devices are used to bring down a structure intentionally.”
They established that “15 years after the event a growing number of architects, engineers, and scientists are unconvinced by that explanation.”
The researchers have observed that:
Fire usually does not reach high enough temperatures, and neither does it last long enough for the main structural elements to heat up and melt, causing the building’s collapse (the temperature at which industrial steel melts is defined by the factor of safety determined in the building’s design). WTC7, for example, has a factor of safety over 3 or higher.
A temperature of approximately 660°C would be necessary in order to melt steel.
In addition, there are typically fire suppression systems (or water sprinkles) of this type of buildings, which make it even harder to reach the necessary temperature.
Main structural elements covered in fireproof materials keep them safe from high temperatures and make it possible to avoid their collapse.
Steel-framed towers like the one discussed, usually structured in levels (redundant structural systems), means that if a small part of the tower collapses, the rest of the tower would not be dragged down by that part. Since now, three steel-framed towers have suffered partial collapses because of a fire, and it never leads to a total collapse.
More than that, other high-rises with a steel-framed structure have suffered long fires without having either a total or partial collapse. Also, high-rises designs resist high winds, earthquakes, long lasting gravity pressure and other extreme events.
The researchers also noticed that the Twin Towers, in particular, were designed to resist to an airplane crash.
As they declare:” The total collapse of WTC 7 at 5:20 pm on 9/11, is remarkable because it exemplified all the signature features of an implosion: The building dropped in absolute free fall for the first 2.25 seconds of its descent over a distance of 32 meters or eight stories.
Its transition from stasis to free fall was sudden, occurring in approximately one-half second. It fell symmetrically straight down. Its steel frame was almost entirely dismembered and deposited mostly inside the building’s footprint, while most of its concrete was pulverized into tiny particles.
Finally, the collapse was rapid, occurring in less than seven seconds. Given the nature of the collapse, any investigation adhering to the scientific method should have seriously considered the controlled demolition hypothesis, if not started with it.
Instead, NIST (as well as the Federal Emergency Management Agency, which conducted a preliminary study prior to the NIST investigation) began with the predetermined conclusion that the collapse was caused by fires.”
Furthermore, the first investigations did reveal that: “The specifics of the fires in WTC 7 and how they caused the building to collapse remain unknown at this time. Although the total diesel fuel on the premises contained massive potential energy, the best hypothesis has only a low probability of occurrence.”
In 2006, Dr. Shyam Sunder, the chief lead investigator at the NIST, declared that: “Truthfully, I don’t really know. We’ve had trouble getting a handle on building No. 7.”
In conclusion “The collapse mechanics discussed above are only a fraction of the available evidence indicating that the airplane impacts and ensuing fires did not cause the collapse of the Twin Towers”, the report continues. Even more, “videos show that the upper section of each tower disintegrated within the first four seconds of collapse.
After that point, not a single video shows the upper sections that purportedly descended all the way to the ground before being crushed. Videos and photographs also show numerous high-velocity bursts of debris being ejected from point-like sources.
NIST refers to these as “puffs of smoke” but fails to properly analyze them. NIST also provides no explanation for the mid-air pulverization of most of the towers’ concrete, the near-total dismemberment of their steel frames, or the ejection of those materials up to 150 meters in all directions.”