1) The World Trade Center (WTC) twin towers were destroyed by controlled demolitions.

This is how the collapses may have appeared to non-experts, but demolition experts point out many differences:

• Demolition professionals always blow the bottom floors of a structure first, but the WTC tower collapses began at the upper levels, where the planes hit the buildings.

• Non-experts claim that debris seen blowing out of windows was evidence of explosive charges, but experts identify this as air and light office contents (paper, pulverized concrete, etc.) being forced out of windows as floors collapsed on each other.

• Demolition firms had very sensitive seismographs operating at other sites in Manhattan on September 11.  None recorded any explosions during the tower collapses.

• Clean-up crews found none of the telltale signs of controlled demolitions that would have existed if explosive charges had been used.

• Cutting away walls, insulation, plumbing, and electrical conduits to place numerous charges on the towers’ structural columns in advance would not have gone unnoticed. 

• For more information, see ImplosionWorld’s article on the WTC collapses, the National Institute of Science and Technology's "Answers to Frequently Asked Questions," and Popular Mechanics, parts 4 and 5.

• Boeing, which manufactured the planes that struck the towers, stated that all its commercial jet transports are configured so that they cannot be controlled from anywhere except the flight deck of the aircraft.

• Passengers onboard the flights made several phone calls.  All reported that hijackers had commandeered the planes.

• For more information, see “Did a Plane Hit the Pentagon?”

4)  United Airlines flight 93, which crashed in Pennsylvania, was shot down by a missile.

• The cockpit voice recorder of this flight was recovered and showed that the passenger revolt caused the hijackers to deliberately crash the plane.  The hijackers controlled the plane until its impact.  See full transcript.

• The U.S. military did not learn that flight 93 had been hijacked until four minutes after it crashed, as recently released tapes demonstrate.

• The military never gave interceptor pilots authorization to shoot down United flight 93.  See article on tapes.

• For more information, see The 9/11 Commission Report chapter 1, “We Have Some Planes,”pages 13-14.

5)  World Trade Center building 7 was destroyed by a controlled demolition.

• This allegation was fueled by a comment by the WTC owner that, after WTC 7 was judged to be unstable, he recommended pulling a group of firefighters out of the building, using the phrase “pull it” in reference to the contingent of firefighters.  For more details, see 9/11 Revealed?

• Conspiracy theorists have interpreted the “pull it” remark as slang for demolishing the building with explosives.  But demolition experts say “pulling” a building means attaching long cables to a weakened structure and literally pulling it down with bulldozers and other powerful machinery – not using explosives. 

• Seismographs recorded no telltale spikes or anomalies that would have indicated the use of explosives.

• For more information, see ImplosionWorld article, , the National Institute of Science and Technology’s “Answers to Frequently Asked Questions,”  and Popular Mechanics, part 5.

6)  Insider trading in the stocks of United Airlines and American Airlines just before September 11 is evidence of advance knowledge of the plot.

• The 9/11 Commission investigated this issue in detail, concluding, “Some unusual trading did in fact occur, but each such trade proved to have an innocuous explanation.”

• For example, it stated, “much of the seemingly suspicious trading in American [Airlines stock] on September 10 was traced to a specific U.S.-based options trading newsletter, faxed to its subscribers on Sunday, September 9, which recommended these trades.”

• For other examples, see The 9/11 Commission Report, “Notes” section, page 499, footnote 130.

7)  Four thousand Jews failed to show up for work at the World Trade Center on September 11.

• It appears from media reports that some 10-15% of WTC victims were Jewish, indicating there were no mass absences.

• The “4,000” figure apparently came from an early statement by the Israeli Foreign Ministry that some “4,000 Israelis” were believed to be in the New York and Washington areas, where the attacks occurred.  This figure was apparently seized upon by conspiracy theorists, in an attempt to bolster the false rumor.

• For more information, see “The 4,000 Jews Rumor.”

8)  Al Qaida is not responsible for the September 11 attacks.

• Al Qaida leaders, including Osama bin Laden, have repeatedly confirmed that they planned and carried out the September 11 attacks.

• In an audiotape released on May 23, 2006, bin Laden stated, “I was responsible for entrusting the 19 brothers … with those raids ….”

• In a November 2001 tape, bin Laden said, “We calculated in advance the number of casualties … who would be killed ….  I was the most optimistic of them all. … Due to my experience in this field, I was thinking that the fire from the gas in the plane would melt the iron structure of the building and collapse the area where the plane hit and all the floors above it only.”

• For more information, see “Al Qaeda and September 11^th.”