High Speed Massive Projectiles from the WTC - speed calculation
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Cutter Charges in the North Tower
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Cockpit recorders
Israeli agents
It has been claimed that Israeli agents may have had foreknowledge of the attacks. Four hours after the attack, the FBI arrested five Israelis who had been filming the smoking skyline from the roof of a white van in the parking lot of an apartment building, for "puzzling behavior". The Israelis were videotaping the events, and one bystander said they acted in a suspicious manner: "They were like happy, you know ... They didn't look shocked to me. I thought it was very strange." While The Forward, a New York Jewish news magazine, reported that the FBI concluded that two of the men were Israeli intelligence operatives, a spokesperson for the Israeli Embassy in the United States said that they had not been involved in any intelligence operation in the United States. The FBI eventually concluded that the five Israelis had no foreknowledge of the attacks.
(The cockpit voice recorder from Flight 77 was
heavily damaged from the impact and resulting fire)
The plane crashes and resulting fires caused the collapse of the World Trade Center. Controlled demolition conspiracy theories say the collapse of the North Tower, South Tower, or of 7 World Trade Center was caused by explosives installed in the buildings in advance.
Demolition theory proponents, such as Brigham Young University physicist Steven E. Jones, architect Richard Gage, software engineer Jim Hoffman, and theologian David Ray Griffin, argue that the aircraft impacts and resulting fires could not have weakened the buildings sufficiently to initiate a catastrophic collapse, and that the buildings would not have collapsed completely, nor at the speeds that they did, without additional energy involved to weaken their structures.
In the article "Active Thermitic Material Discovered in Dust from the 9/11 World Trade Center Catastrophe", which appeared in the Open Chemical Physics Journal, authors Niels Harrit of the University of Copenhagen's Department of Chemistry, Jeffrey Farrer of Brigham Young University's Department of Physics and Astronomy, Steven E. Jones, and others state that thermite and nano-thermite composites in the dust and debris were found following the collapse of the three buildings, which they conclude to be proof that explosives brought down the buildings. The article contained no scientific rebuttal and the editor in chief of the publication subsequently resigned.
Jones has not explained how the amount of explosive needed to do this could have been positioned in the two buildings without drawing attention, but mentioned efforts to research the buildings' maintenance activity in the weeks prior to the event. Federal investigators at the National Institute of Standards and Technology state that enormous quantities of thermite would have to be applied to the structural columns to damage them, but Jones disputed this, saying that he and others were investigating "superthermite". Brent Blanchard, author of "A History of Explosive Demolition in America", who corresponded with Jones, states that questions about the viability of Jones' theories remain unanswered, such as the fact that no demolition personnel noticed any telltale signs of thermite during the eight months of debris removal following the towers' collapse. Blanchard also said that a verifiable chain of possession needs to be established for the tested beams, which did not occur with the beams Jones tested, raising questions of whether the metal pieces tested could have been cut away from the debris pile with acetylene torches, shears, or other potentially contaminated equipment while on site, or exposed to trace amounts of thermite or other compounds while being handled, while in storage, or while being transferred from Ground Zero to memorial sites.Jones also said that molten steel found in the rubble was evidence of explosives, as an ordinary airplane fire would not generate enough heat to produce this, citing photographs of red debris being removed by construction equipment, but Blanchard said that if there had been any molten steel in the rubble any excavation equipment encountering it would have been immediately damaged. Other sampling of the pulverized dust by United States Geological Survey and RJ Lee did not report any evidence of thermite or explosives. It has been theorized the "thermite material" found was primer paint. Dave Thomas of Skeptical Inquirer magazine, noting that the residue in question was claimed to be thermitic because of its iron oxide and aluminum composition, pointed out that these substances are found in many items common to the towers. Thomas said that in order to cut through a vertical steel beam, special high-temperature containment must be added to prevent the molten iron from dropping down, and that the thermite reaction is too slow for it to be practically used in building demolition. Thomas pointed out that when Jesse Ventura hired New Mexico Tech to conduct a demonstration showing nanothermite slicing through a large steel beam, the nanothermite produced copious flame and smoke but no damage to the beam, even though it was in a horizontal, and therefore optimal position.
The National Institute of Standards and Technology (NIST) concluded the accepted version was more than sufficient to explain the collapse of the buildings. NIST and many scientists refuse to debate conspiracy theorists because they feel it would give these theories unwarranted credibility. Specialists in structural mechanics and structural engineering accept the model of a fire-induced, gravity-driven collapse of the World Trade Center buildings without the use of explosives. As a result, NIST said that it did not perform any test for the residue of explosive compounds of any kind in the debris.
Soon after the day of the attacks, major media sources published that the towers had collapsed due to melted steel. Knowledge that the burning temperatures of jet fuel would not melt the steel support structure of the WTC contributed to the belief among skeptics that the towers would not have collapsed without external interference (something other than the planes). NIST does not claim that the steel was melted, but rather that the weakened steel, together with the damage caused by the planes' impacts, caused the collapses. NIST reported that a simulation model based on the assumption that combustible vapors burned immediately upon mixing with the incoming oxygen showed that "at any given location, the duration of gas temperatures near 1,000 °C was about 15 to 20 minutes. The rest of the time, the calculated temperatures were 500 °C or below."
Jones also said that molten steel found in the rubble was evidence of explosives, as an ordinary airplane fire would not generate enough heat to produce this, citing photographs of red debris being removed by construction equipment, but Blanchard said that if there had been any molten steel in the rubble any excavation equipment encountering it would have been immediately damaged. Other sampling of the pulverized dust by United States Geological Survey and RJ Lee did not report any evidence of thermite or explosives. It has been theorized the "thermite material" found was primer paint. Dave Thomas of Skeptical Inquirer magazine, noting that the residue in question was claimed to be thermitic because of its iron oxide and aluminum composition, pointed out that these substances are found in many items common to the towers. Thomas said that in order to cut through a vertical steel beam, special high-temperature containment must be added to prevent the molten iron from dropping down, and that the thermite reaction is too slow for it to be practically used in building demolition. Thomas pointed out that when Jesse Ventura hired New Mexico Tech to conduct a demonstration showing nanothermite slicing through a large steel beam, the nanothermite produced copious flame and smoke but no damage to the beam, even though it was in a horizontal, and therefore optimal position.
The National Institute of Standards and Technology (NIST) concluded the accepted version was more than sufficient to explain the collapse of the buildings. NIST and many scientists refuse to debate conspiracy theorists because they feel it would give these theories unwarranted credibility. Specialists in structural mechanics and structural engineering accept the model of a fire-induced, gravity-driven collapse of the World Trade Center buildings without the use of explosives. As a result, NIST said that it did not perform any test for the residue of explosive compounds of any kind in the debris.
Soon after the day of the attacks, major media sources published that the towers had collapsed due to melted steel. Knowledge that the burning temperatures of jet fuel would not melt the steel support structure of the WTC contributed to the belief among skeptics that the towers would not have collapsed without external interference (something other than the planes). NIST does not claim that the steel was melted, but rather that the weakened steel, together with the damage caused by the planes' impacts, caused the collapses. NIST reported that a simulation model based on the assumption that combustible vapors burned immediately upon mixing with the incoming oxygen showed that "at any given location, the duration of gas temperatures near 1,000 °C was about 15 to 20 minutes. The rest of the time, the calculated temperatures were 500 °C or below."
The National Institute of Standards and Technology (NIST) concluded the accepted version was more than sufficient to explain the collapse of the buildings. NIST and many scientists refuse to debate conspiracy theorists because they feel it would give these theories unwarranted credibility. Specialists in structural mechanics and structural engineering accept the model of a fire-induced, gravity-driven collapse of the World Trade Center buildings without the use of explosives. As a result, NIST said that it did not perform any test for the residue of explosive compounds of any kind in the debris.
Soon after the day of the attacks, major media sources published that the towers had collapsed due to melted steel. Knowledge that the burning temperatures of jet fuel would not melt the steel support structure of the WTC contributed to the belief among skeptics that the towers would not have collapsed without external interference (something other than the planes). NIST does not claim that the steel was melted, but rather that the weakened steel, together with the damage caused by the planes' impacts, caused the collapses. NIST reported that a simulation model based on the assumption that combustible vapors burned immediately upon mixing with the incoming oxygen showed that "at any given location, the duration of gas temperatures near 1,000 °C was about 15 to 20 minutes. The rest of the time, the calculated temperatures were 500 °C or below."
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Trailing edge wing flap gear (not landing gear) found near 51 Park Pl shows a serial number that reads in part, 'Boeing' indicating it was from a plane that crashed into the World Trade Center on September 11, 2001.
With this serial number we can find out the owner of the plane or if it was a remote controlled plane owned by the US Air Force.
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