User:Cs32en/911/Sources/BBC/200x/content

Richard Sisson says the sulfur came from gypsum in the wallboards [...]

"As well as housing offices of leading financial companies, Tower 7 also had some unusual tenants: the Secret Service, the CIA, the Department of Defence and the Office of Emergency Management, which would coordinate any response to a disaster or a terrorist attack.

Dylan Avery, the writer and director of the internet film Loose Change, thinks the building was suspicious:

"You have to look at what was inside Building 7. You had the largest CIA field office ... you had a number of government agencies inside the building. [...]

Some people argue that the US government had to demolish Tower 7 because it is where plans were hatched for a massive conspiracy on 9/11 and even that the hijacked planes were guided to their targets from Tower 7. Others believe the government also wanted to destroy key files held there about corporate fraud. [...]

However, the chief counter-terrorism adviser to President Bush on 9/11, Richard Clarke, does not think there is anything mysterious about Tower 7. He told The Conspiracy Files:

"I was in the World Trade Centre 7 on a number of occasions. This was a commercial office building in downtown New York. The fact that there were some government agencies in there, is certainly true, but there were lots of other people in there too and you could have rented an office or floor anybody could have." [...]

However, critics argue that the evidence they have seen suggests there was very little fire in Tower 7 and certainly not enough to cause it to collapse. A fire protection engineer, Scott Grainger, who has joined Architects and Engineers for 9/11 Truth, told the BBC:

"The fires weren't burning on all the floors simultaneously. They were scattered about on the floors.

"And as they burn they're going to move through the building so they'll certainly heat up some of the steel in an area. But then as it moves on when it consumes the combustibles there, the chairs, desks, the tables, whatever papers were there. Then there's no longer any source of heat." [...]

Lt Frank Papalia of the New York Fire Department told the programme:

"We looked at it and said there's so much fire in this building, nobody's going to put this fire out".

Photographer Steve Spak, who took some of the clearest images of the damage to Tower 7, told the BBC there was smoke on a lot of floors on the south side of the building and numerous floors had fires.

"Through my experience of taking fire photography for the last 30 years, to me that's an indication of extremely heavy fire condition and a dangerous fire condition." [...]

However, critics say the report has been too long coming. Some have even suggested the way official bodies have investigated Tower 7's collapse makes it looks like they are hiding something.

The first inquiry into Tower 7 by the Federal Emergency Management Agency, or Fema, said the building collapsed because intense fires burned for hours, fed by thousands of gallons of diesel stored in the building. But it also said this had "only a low probability of occurrence" and more work was needed. Critics point out that was six years ago. [...]

According to Richard Gage, an American architect who founded Architects and Engineers for 9/11 Truth, the skyscraper was destroyed by a controlled demolition:

"Building 7 is the smoking gun of 9/11. It is the most obvious example of controlled demolition with explosives." [...]

They point to Danny Jowenko, a Dutch demolition expert who has been in the business for 28 years, and who when shown footage of Tower 7's collapse said:

"That is a controlled demolition... absolutely. It's been imploded. It's a hired job done by a team of experts." [...]

Critics of the official account believe they have found evidence of the unconventional demolition of Tower 7 using a substance called thermite.

Thermite is a substance that can literally melt steel and is made up of iron oxide and aluminium.

Sceptics base their claims for this on an analysis of the dust from the World Trade Centre site after the attacks. In this dust they have found tiny iron rich spheres. These spheres can only be formed in very high temperatures - temperatures higher than those reached in the fires in the towers before their collapse.

The former professor of physics, Steven Jones, believes the spheres he has found in the dust from the World Trade Centre site match the spheres you get in a thermite reaction. He argues that thermite is the explanation for the presence of iron and aluminium in the spheres.

However, other scientists say there are other explanations for presence of these tiny iron rich spheres.

They could have come from the cutting torches used after 9/11 to clear the site, from any building work on the site before the attacks or even from the collapse of the Towers themselves. [...]

Professor Richard Sisson says it did not melt, it eroded. The cause was the very hot fires in the debris after 9/11 that cooked the steel over days and weeks.

Professor Sisson determined that the steel was attacked by a liquid slag which contained iron, sulphur and oxygen.

However, rather than coming from thermite, the metallurgist Professor Sisson thinks the sulphur came from masses of gypsum wallboard that was pulverised and burnt in the fires. [...]

Critics say that by using the phrase "pull it" Larry Silverstein let slip the fact that he was involved in a decision to bring the building down. They point out that Silverstein took out a $3.5bn (£1.75bn) insurance policy on the Twin Towers just two months before the attacks. A policy that was to pay out in the event of a terrorist attack. [...]

Because of the furore over the use of the words "pull it" in the interview, on 9, September 2005, Mr Dara McQuillan, a spokesman for Silverstein Properties, issued the following statement on the issue:

"In the afternoon of September 11, Mr Silverstein spoke to the Fire Department Commander on site at Seven World Trade Centre.

"The Commander told Mr Silverstein that there were several fire fighters in the building working to contain the fires.

"Mr Silverstein expressed his view that the most important thing was to protect the safety of those fire fighters, including, if necessary, to have them withdraw from the building.

"Later in the day, the Fire Commander ordered his fire fighters out of the building and at 5:20pm the building collapsed. No lives were lost at 7 World Trade Centre on September 11, 2001.

"As noted above, when Mr Silverstein was recounting these events for a television documentary he stated, 'I said, you know, we've had such terrible loss of life. Maybe the smartest thing to do is to pull it.' Mr McQuillan has stated that by 'it', Mr Silverstein meant the contingent of fire fighters remaining in the building." [...]

Both CNN and the BBC reported that Tower 7 was about to collapse or had collapsed when in fact it was still standing. Some have even suggested this shows the media were handed scripts by the conspirators.

The BBC says this was simply an honest mistake on what was probably the fastest moving, most chaotic and most confusing story they had ever covered. After an investigation the head of BBC World News, Richard Porter, told The Conspiracy Files:

"The investigations we've carried out suggest very strongly that we were working on the basis of an incorrect news agency report."

The news agency Reuters have given this statement to the BBC:

"On September 11, 2001, Reuters incorrectly reported that one of the buildings at the New York World Trade Centre, 7WTC, had collapsed before it actually did. The report was picked up from a local news story and was withdrawn as soon as it emerged that the building had not fallen." [...]

There is no evidence that anyone died in Tower 7 on 9/11. However, conspiracy talk shows and websites seized on a recent interview for Loose Change with the crucial eyewitness Barry Jennings.

The writer and director of Loose Change, Dylan Avery, told The Conspiracy Files: "The amount of detail that Barry gave us in this interview was unreal. He says he was stepping over dead bodies in the lobby."

Barry Jennings himself disagrees with their interpretation of his words. Barry Jennings told the BBC: "I didn't like the way you know I was portrayed. They portrayed me as seeing dead bodies. I never saw dead bodies"

Dylan Avery is adamant that he didn't take anything out of context. He played The Conspiracy Files a recording of Barry Jennings words: "The fire fighter who took us down kept saying do not look down. And I kept saying why.

"He said do not look down. And we're stepping over people and you know you could feel when you're stepping over people."

However, Barry Jennings told the BBC: "I said it felt like I was stepping over them but I never saw any.

"And you know that's the way they portrayed me and I didn't appreciate that so I told them to pull my interview.""