The events of September 11, 2001

The events of September 11, 2001
The events of 11 September 2001 were a series of attacks in the United States on Tuesday, September 11, 2001. Four civilian commercial transport planes were diverted and routed to specific targets, three of which succeeded. The targets were the twin towers of the International Trade Center in Manhattan and the Pentagon. As a result of these events, 2973 victims were missing, as well as thousands of wounded and sick people from the inhalation of fire smoke and toxic fumes. US Defense Secretary Donald Rumsfeld ordered the Devcon level to rise to 3, and the precautions were taken to increase the Devcon 2 level, but that did not happen. These precautions were not successful in countering the aircraft attacks on the two towers and were highly critical of their security officials
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According to the official version of the US government, on Tuesday, September 11, 2001, 19 people linked to al Qaeda carried out attacks using civilian planes hijacked. The perpetrators of the operation were divided into four groups, each of which included a person who had taken lessons at the US Air Navigation Institutes. The attack was carried out by the hijacking of commercial civilian transport aircraft, and then directed to collide with specific targets. The first attack was around 8:46 am New York time, when one of the hijacked planes collided with the north tower of the World Trade Center. A quarter of an hour later, at about 9:03 am, another plane collided with the South Tower building. More than half an hour later, a third plane collided with the Pentagon building. While the fourth plane was supposed to hit the White House, but crashed before reaching the target.
These events led to major changes in US policy, which began with the declaration of the war on terror, including the war on Afghanistan and the fall of the Taliban regime, the war on Iraq, and the overthrow of Saddam Hussein there.
Less than 24 hours after the events, NATO declared that the attack on any NATO member country was an attack on all 19 member states. The process had the effect of mobilizing government support for most of the world and the two main parties in Congress and the Senate forgot their internal differences. In the Arab and Islamic countries, there was a wide disparity in the official positions of the government with the prevailing public opinion on the street that was either indifferent or convinced that the strike was the result of what some called «American intervention in the affairs of the world».
Hours after 9/11, the United States blamed al Qaeda and its leader Osama bin Laden. US forces later claimed to have found a tape in a bombed-out house in Jalalabad in November 2001, in which Osama bin Laden, speaking to Khalid bin Ouda bin Mohammed al-Harbi, appeared to be planning the operation. The tape was met with a wave of doubts about its validity. But in 2004, in a video broadcast before the US elections on October 29, 2004, bin Laden claimed responsibility for the attack. According to the FBI, Mohammed Atta (whose full name is Mohammed Atta al-Sayyid) was the person responsible for the crash of the first plane at the World Trade Center building. Mohammed Atta was also the master planner for the other operations that took place in what became known as the September 11 events.
World Trade Center
The structure of the World Trade Center towers in terms of the construction method was one of the structures of the modern buildings, and they were built in many places in the world. The height of the towers in New York was 417 and 415 meters. The world's two tallest buildings at the time of their construction in 1970. The World Trade Center architecture, despite the magnitude of the disaster, saved thousands of lives because the twin towers remained standing and steadfast for more than an hour after the planes penetrated them, allowing thousands of people who were on the lower floors to escape and survive. Each tower consists of a steel base that connects to a strong pillar (the central trunk) of steel and cement in the center of each tower. Each column has elevators and stairs, with steel bars as horizontal light bars connected to vertical steel columns. Built in the form of a steel frame that forms its surroundings. These horizontal columns carry the concrete roof of each floor and connect the peripheral columns to the central trunk, preventing these columns from spilling out. The floors were cement and all the steel was covered with concrete to give the firefighters an opportunity of one to two hours to do their work. Especially that the experts of the architectural and construction company (Tahmadso) emphasize that any structural construction of steel or other must be designed to withstand three times the load and is subject to safety factors of various materials, each roof must bear the weight and weight of the roof above it .
Some believe that the two planes that attacked the towers without windows, making some believe the assumption that the aircraft were two warplanes and were at the bottom of each of them like a missile, and this form does not see in the civil aircraft, as seen in the video of the incident that there was a glow moments before The crash of the first aircraft destroyed a number of columns surrounding several floors of the building, around the impact point, weakening the structure of the building or causing the shock to collapse part of the central trunk, enough collapse of one floor to fall all the blocks Above it from the upper floors and Hit the rest of the parts of the building underneath which shocks strongly with the collapse of one of the floors, which led to the collapse of the entire tower layer after the other too quickly in the form of consecutive blows and shocks. The southern tower, which was hit by the second plane, crashed and crashed first, followed by the North Tower, which was hit by the first plane in The collapse is 20 minutes away on September 11th. In the video analysis of the aircraft, Eduardo Kausel, a professor of civil engineering at the Massachusetts Institute of Technology in America, showed that the speed of the second plane at the moment of its impact on the South Tower was 865 km / h and the speed of the first plane was 705 km / h. It is known that there is a direct relationship between the speed of the aircraft moment of impact and the impact of the shock, and the time between the impact and collapse. The impact level in the North Tower was 15-storey high in the South Tower. Despite all hypotheses and intuitions, it is not known whether the collapse began with the peripheral pillars or the central trunk, and perhaps more than one of these factors met. It may be that the collapse of the roofs of one of the floors that led to the docking of peripheral columns outside, but this destruction alone is not enough to justify the collapse of the towers in this way. As well as the spread of fire in the upper floors make the steel less hardness and can not bear the weight above it at the degrees of this high temperature Vnthi and bear the weight. This novel seems logical at first sight, but the experts have a close view of the logic of everything in the scene of the disaster. Construction engineers and architects said the use of stronger building materials would have allowed people trapped on the upper floors to leave the towers, or perhaps prevent them from collapsing completely. But engineer Leslie Robertson, who designed the World Trade Center towers to protect against the crash of the Boeing 707, : Did not put in his calculations the weight of the fuel carried by the fuel that was borne by the Boeing 767, which hit the towers, and led to the fires that caused the collapse of the towers and there was a fire in the middle and not the upper buildings adjacent to the towers before falling, These fires. A number of observations on these minerals have been published and published a year after the disaster by Dr. Keith Eaton in The Structural Engineer, the journal of structural engineering. He saw pictures of these molten metals, and some of them were still red-fired weeks after the incident. The smelters were then a molten metal lake because the earth beneath it was inflamed, and four-inch steel sheets were seen being extracted and berries because of the collapse of the massive buildings. Six months after September 11, the land there [?] Has a temperature ranging from 600 to 1500 francs. In the first few weeks, the workers were taking off the steel bars and their limbs were dripping solid steel and was still orange red six weeks after September 11. It is like a volcanic lava in the heart of a volcano that remains hot and long-lasting as long as it is isolated underground and steel melts above 2,000 degrees Celsius. But government reports showed that building fires were not enough to melt steel beams. All official reports did not answer this ambiguity, making it a mystery about how tall buildings collapsed. This is confirmed by Professor Thomas Eger. Thomas Eagar of the World Trade Center fire does not melt steel and did not cause the collapse of the building, although the media and many scientists believe that steel melted. Because the aircraft fuel ignites at 1000 degrees Celsius and the steel fuses at 1500 degrees Celsius. Wreck of the World Trade Center Complex. Picture from the NASA Cessna Station Jet Telescope On September 23, 2001, from 1,005 meters high, the 18,101 tons of steel wreckage was sent to be re-manufactured without being tested and 80% of it was good and did not give the experts an opportunity to examine it. The cause of the collapse of the twin towers and the authorities of the city affected by the investigation in the pictures and videos and eyewitness accounts. A few photographs still show that explosive materials were thrown from the towers and the concrete was cut off and a piece of column steel was thrown in the early stages of the collapse. The images of the southern tower showed clear episodes of explosions and lava eruptions around the building and just below the point of collapse, as if explosions were like volcanoes. The ballistics were numerous, indicating that the explosion was inside the building. Not surprisingly, the two towers were destroyed by the sheer size of the materials that were dropped during the initial stages of collapse and the amount of steel pieces that fell in the center of the dust, including the columns of whole floors. These columns were deeply attached to the panels along each roof but crashed in a way at the same time, High. This consensus between the tossing of debris, dust and rapidly rising smoke shows that there have been bombings that have resulted in all this. The images taken by Biggert show that the building turned into dust before collapsing because huge amounts of dust surged through the air and quickly formed a huge black cloud in the skies of New York. The South Tower appeared in a videotape of pictures of the north-east corner of the building, showing rows of explosions on the eastern façade at the level of the first collapse. The building was taken down on the ground and 30 stories high on the south side, where nearly half of it was lost, before the rest of the structure collapsed below it - and hit nearby buildings. It was clear that the explosions were violently receiving dust and shrapnel from the roof of the ceiling and were moving quickly down the building. The north tower had collapsed from the northeastern side of the building. It should be noted that structural steel at a temperature of 550 ° C is hardness and hardness of 60% of its hardness and lose part of its flexibility, which is at normal temperature and this weakness of steel is assumed to be the cause of the collapse of the towers of the World Trade Building. But experts say that steel if its hardness reached 60%
It is able to withstand three times the assumed load. In order to break down a steel structure, the strength ratio must be 20% of its strength. It is cold. This rate must reach a temperature of more than 720 ° C. The steel loses its elasticity and the structure of the steel structure collapses. The experts in Europe, America and Japan simulated a similar fire in three multi-storey buildings made of steel structures. The fire was in cars with flammable petroleum materials. Next to several cars and the maximum temperature was 360 degrees Celsius. The steel remained strong, resilient and resistant As the fire was for a limited time. The steel in the buildings was not isolated from the heat as in the center of the World Trade Center. The North Tower was hit by the plane from the north side in the 93rd floor at 8:45 am and the southern tower was hit by a second plane at 09.03 am For the role of 80. Draw to clarify the location of the collision of the two planes and the timing between them. Those who planned the operation used jet fuel in smelting instead of using oxygen, acetylene, electric welding or high-temperature furnaces. The first plane hit the North Tower. When the first plane crashed with all its cargo of kerosene in the north tower, which flared and the flame was lit up, the black smoke turned into a white smoke rising from the windows as it appeared in the pictures. The southern tower, which was hit by the second plane, disappeared from the flames and smoke rose. This indicates that the second fire has subsided but something is still burning in part to leave the black fumes rising with smoke and this smoke is sooty smoke caused by the lack of heat or oxygen. But at 10:29 pm, the northern tower was burned by the steel that supports the structure of the huge building, which was heated by heat in a series of reactions that made it collapse on the ground ... With the lowest fuel, the South Tower collapsed just 47 minutes after the second plane crashed. This is half the time span of the North Tower collapse. The steel in the building was equivalent to 200,000 tons. One of the towers stood for 55 minutes before collapsing, while the second tower held up for an hour and forty minutes. It is known to melt at 1535 C (2795 F). The range of 800-900 centigrade corresponds to the heating and formation of ordinary iron and mourning mug and not to making skyscraper skyscraper steel. But Professor Eduardo Kausel, a professor of civil and environmental engineering, is convinced that kerosene fires can melt steel but does not show the degree to which the steel melts and the time to melt thousands of tons. Forensic experts have identified 1,585 of the remains of 2,749 victims of the Trade Center disaster by DNA amino acids for human remains at the site of the disaster. Scientists said at a conference of the American Chemical Society that two-month toxic chlorine fumes were emitted from the wreckage of the towers because of chemical reactions between tons of cement, glass, furniture, carpets, insulation materials, computers, papers, toxic metals, acids, paper and plastic in the square mile of the two towers of the Trade Center

Pentagon building

 On September 11, two planes took off from Boston Airport on their way to Los Angeles. But one crashed into the north tower of the World Trade Center building, the second 18 minutes later hit the south tower of the center and about an hour later crashed aircraft on the western side of the Pentagon and the fourth plane landed near Pittsburgh, Pennsylvania, did not take one picture of the plane that claimed America fell and published A picture of a circular hole left by an unknown missile whose remains were not found. The US authorities announced that they were on their way to strike the White House in Washington. According to the secrecy surrounding the events of September 11 and the lack of evidence that the Pentagon building was hit by a jetliner with a concrete reinforced concrete wall. All the photographs taken by the FBI photographers of the Pentagon's impact site clearly showed that a piece of small-diameter turbo fan was readily recognizable. Some believe the Pentagon did not destroy its side with a Boeing 757 and the conspiracy theorists believe the attack may have been from a warplane.

Through the pictures, Pentagon bombs were seen inside the building as the plane crashed. From 77 feet from the wall hit by the aircraft and there was no impact on the Pentagon building collision of a Boeing 757. The US intelligence had withdrawn cameras from the buildings above the Pentagon building and cameras around the Pentagon did not imagine any aircraft coming Towards him. Even the press and video footage showed that the crash was 65 feet long and the wings of the Boeing 757 were 160 feet long from wing to wing and above that hole the roof of the Pentagon was still standing, not falling until the firefighters were surprised, especially as the park around the building It remained uncoordinated and found a round piece less than 3 feet in diameter next to what appeared to be a piece of construction site where the airplane machine lived and a thick piece of insulating material. But the Boeing 757 has two large engines, each with a diameter of 9 feet and a length of 12 feet and a 78.5-inch fan head. These measurements are not seen in the pictures of the building. So some people did not believe the official version that the Boeing 757 with its two giant engines and its landing gear landed near the ground level [?] And hit the huge Pentagon wall.

No landing gear was seen at the scene. Five photos taken from video footage taken by ground-mounted cameras at the Pentagon showed that a small white object was approaching the Pentagon building and caused a loud explosion when it hit. No aircraft were seen in the pictures, especially as the Boeing 60-ton Boeing aircraft did not appear in the videotapes taken by Pentagon cameras and took a picture of that small body. One of those who saw the incident told the Washington Post that the plane was small and its voice was like the sound of a jet fighter jet that could not carry more than 12 passengers in any way. Who said it was a small plane or a Global Hawk drones that caused the Pentagon attack to identify the piece of photos that appeared and determine the type of aircraft that attacked the Pentagon. The Global Hawk has a single 43.5-inch machine that flies unmanned and is guided by satellites.

The area where the plane crashed was under repair and reconstruction, so most of its offices were empty. It should be noted that, after the incident, there were no debris, except for very small parts and one engine.

In addition, some glass windows in the Pentagon building near the crash site did not crash or damage.

The events of September 11th and the world

Considered by America and its allies as a terrorist act.

The supreme leader of the Shiites in the world, Ali al-Sistani, denounced this act and promised a terrorist act targeting innocent people only.

Arab leaders regarded it as terrorism, and Yasser Arafat gave his blood to the wounded.

Many Muslims consider it to be terrorism in the latest statistics.

Some of the Muslims consider it a jihad, a chapter of the good war on evil. They often line up with al-Qaeda and its direction. Its leader, Osama bin Laden, implicitly confessed to Zawahri in his videos.

And some of the competent authorities pointed out that the events are not the planning of the base or Osama bin Laden, but the planning and incitement of US intelligence

 The events of September 11 and the world

Considered by America and its allies as a terrorist act.

The supreme leader of the Shiites in the world, Ali al-Sistani, denounced this act and promised a terrorist act targeting innocent people only.

Arab leaders regarded it as terrorism, and Yasser Arafat gave his blood to the wounded.

Many Muslims consider it to be terrorism in the latest statistics.

Some of the Muslims consider it a jihad, a chapter of the good war on evil. They often line up with al-Qaeda and its direction. Its leader, Osama bin Laden, implicitly confessed to Zawahri in his videos.

And some of the competent authorities pointed out that the events are not the planning of the base or Osama bin Laden, but the planning and incitement of US intelligence

 Source: Wikipedia Free Encyclopedia