I was taking firefighters up in the elevator to the 24th floor to get in position to evacuate workers. On the last trip up a bomb went off. We think there were bombs set in the building. Louie Cacchioli, firefighter interview People Weekly
I went round by the freight elevator and I could see it was just blown ... 30th floor you hear explosion ... and at that time we heard a huge explosion. Louie Cacchioli, cited Grave Implications
I heard a loud boom. I was right at the desk there. On the left hand side when you come into Tower I. I walked to where all the doorway glass was broken, and I looked out and I see in the building across the streets, I see the shadow in the building across the street coming down. Firefighter, cited 9/11 Truth & Grave Implications
I wasn’t expecting to see the damage that I saw in the lobby. And the people. And the bodies. The burnt people. The injured people. I really wasn’t prepared for that. Firefighter, cited 9/11 Truth & Grave Implications
You see three explosions and then the whole thing is coming down. Frank Campagna NYFD 4th December 2001, cited 9/11 Eyewitness
35,117. I heard three explosions and then we heard like groaning and the grinding and Tower Two started coming down. Kevin Darnowski NYFD 9th November 2001, cited 9/11 Eyewitness & What’s the Truth?
I had heard a distant boom boom boom, sounded like three explosions. I don’t know what it was. At the time I would have said they sounded like bombs but it was boom boom boom and then the lights all go out. Keith Murphy, NYFD, cited What’s the Truth?
It actually gave at a lower floor, not the floor where the plane hit, because we originally had thought there was like an internal detonation explosives because it went in succession, boom, boom, boom, boom, and then the Tower came down. Ed Cachia, Engine 53, cited What’s the Truth?
On September 11th 2001 the Fire Department of New York faced the largest rescue mission in their history. On 9/11 343 firefighters were killed. 9/11: The Firemen’s Story
The radios that the firefighters are using don’t work properly in skyscrapers. ibid.
I got, ah, an eyewitness who said there was an explosion on floors 7 and 8. 7, 8 ... City of New York audio evidence, cited Loose Change 2nd edition
Battalion 3 to Dispatch: We’ve just had another explosion. ibid.
Warren Street: Because of the secondary explosion; we’ve got numerous people covered with dust from the secondary explosion. ibid.
We got another explosion on the Tower – [floors] 10-13, 10-13. ibid.
Tower II has had a major explosion and what appears to be a complete collapse surrounding the entire area. ibid.
I was involved in the secondary, uh, explosion at Tower 1. ibid.
I thought I heard an explosion – it actually shook my bones – shortly before the first Tower came down I remember feeling the ground shaking, I heard a terrible noise and then debris just flying everywhere. ibid.
This is how it’s been since day one. It’s unbelievable. I mean this is six weeks later. Almost six weeks later. And as we get closer to the centre of this it gets hotter and hotter. It’s probably fifteen hundred degrees ... and it looks like an oven. It’s just roaring inside ... You see that stuff he’s pulling out? Red hot. Rescue worker, news interview, cited September 11th Revisited
We were notified three weeks in advance of the power-down by the port authority. That was relatively short notice to plan to shut down all of our banking systems. It was a big deal. It was unprecedented. We had a data centre on the ninety-seventh floor. So our originating servers were all there. During that weekend the power-down meant that there was no security. The doors were all open basically. And also the security video cameras were all off. There were guys in overalls carrying huge tool boxes. Reels of cable walking around the building that weekend. Scott Forbes, senior IT specialist Fiduciary Trust 2001, leased floor space South Tower, interview cited 9/11 Mysteries & 9/11 Coincidences
It must have been at least four to six weeks before 9/11 – it was like rebuilding work going on upstairs ... There was a lot of heavy machinery, building work going on. It was almost like pneumatic drills. Lots of hammering. So much so that the floors were shaking. That’s how noticeable it was ... But they’d been these heavy noises and vibrations up above. It was really strange ... It was probably the week leading up to 9/11. Every morning I’d come in around seven a.m. And the dust was incredible. It was filthy. It was like the cleaners weren’t cleaning. Right where the windows were there was a sill which enclosed radiators. I was sick to death of the dust which was appearing on the window sills. It was dirty grey and very very noticeable in that week leading up to 9/11. Where was that dust coming from? Scott Forbes, interview cited 9/11 Mysteries & 9/11 Coincidences
No clear explanation of the source of the sulphur has been identified. FEMA Report
NIST contracted with Underwriters Laboratories Inc to conduct tests to obtain new information on the fire endurances of trusses like those used in the WTC towers ... All four test specimens sustained the maximum design load for approximately two hours without collapsing. NIST 2005 p140
The previously molten metal has Manganese and Fluorine in abundance. Electron microprobe data BYU June 2006
My opinion is, based on the videotapes, that after the aeroplanes hit the World Trade Center, there were some explosive devises inside the buildings which caused the buildings to collapse. Van Romero, Vice President for Research at New Mexico Institute for Mining and Technology
Daria Coard, 37, a guard at Tower I, said the security detail had been working twelve-hour shifts for the past two weeks because of numerous phone threats. But on Thursday bomb-sniffing dogs were abruptly removed. Newsday National News 12th September 2000, article Taylor & Gardiner
We have received a confirmed report from ACE Elevator that all ACE Elevator employees are accounted for. ACE Elevator company was providing elevator maintenance for WTC. They were in the middle of a modernisation. Elevator World 12th September 2001
There were reports of underground explosions in both of the Towers at the time of the impact. Jeff King, MIT engineer & research scientist
We know in the weekend before there were power-downs, and there appeared to be evacuation drills going on throughout the previous week. Jeff King
All the characteristics of these collapses show that they must have been controlled demolitions. William Christison, former CIA officer
The temperature of the fire at the World Trade Center was not unusual, and it was most definitely not capable of melting steel. Edgar & Musso, 2001
It is known that structural steel begins to soften around 425 degrees Centigrade and loses half of its strength at 650 degrees Centigrade. This is why steel is stress-relieved in this temperature range. But even a 50% loss of strength is still insufficient, by itself, to explain the WTC collapse. Dr Thomas W Eagar, MIT
In order for the floor to fall down thousands of joints would have to break simultaneously. Eric Hufschmid, author Painful Questions: An Analysis of the September 11th Attack
It looked like a classic controlled demolition. Mike Taylor, National Association of Demolition Contractors
It was very much like a controlled demolition. Matthys Levy, structural engineer, interview Horizon: Fall of The World Trade Centre, BBC 2002
It appeared to me that charges had been placed in the building. And yet the official investigations never considered demolition. Ronald Hamburger, Structural Engineer, FEMA & NIST contributor
As of twenty-one days after the attack the fires were still burning and molten steel was still running. Leslie Robertson, structural engineer & designer of World Trade Centre, National Conference of Structural Engineers 5th October 2001
We designed a building to take the impact of a Boeing 707 hitting the building at any location. Leslie Robertson
The building was designed to have a fully loaded 707 crash into it. That was the largest plane at the time. I believe that the building probably could sustain multiple impacts of jetliners. Frank de Martini, World Trade Centre construction manager, cited Zero: An Investigation into 9/11 & The 9/11 Documentary You Can’t Debunk
They [Twin Towers] were over-designed to withstand almost anything including hurricanes, high winds, bombings, and an aeroplane hitting them. Professor Hyman Brown, WTC construction crew