I lost my husband. My uncle. My nephew. September 11th, 2001. Most people don't know a third tower fell that day. The government says fire brought it down. The collapse of World Trade Center 7 was primarily due to fires. I, along with 1400 other architects and engineers, have found the government's conclusion to be physically impossible. This is Building 7, a 47-story skyscraper that fell on the afternoon of September 11th. The government says that fire brought it down. However, 1500 architects and engineers concluded it was a control demolition. Unastructural engineer. I'm a New York City correction officer. I'm an Air Force pilot. I'm an architect of 20 years, a member of the American Institute of Architects, and I've been studying steel frame fireproof buildings for about that long. Fires in high-rises have never brought down a steel frame high-rise building at all, ever. In the case of Building 7, it collapses straight down into its own footprint at free-fall speed in the first 100 feet. It's dropping, as you can see, symmetrically, smoothly at free-fall speed in the first 100 feet, two and a half seconds. This is uncanny. There's 40,000 tons of structural steel designed to resist this collapse. World Trade Center 7 collapsed because of fires fueled by office furnishings. It did not collapse from explosives or from fuel oil fires. Here is a 47-story skyscraper. At 5.20 in the afternoon, it drops like a rock, and I mean this fast. Free-fall acceleration. Straight down, uniformly, symmetrically. Now, a building with 40,000 tons of structural steel cannot fall straight down without all 80 columns on each floor being removed simultaneously and then synchronistically timed floor by floor. The CIA had an undercover office in 7 World Trade Center. The US official tells CNN the office was involved in counterterrorism and counterintelligence. For the third time today, it's reminiscent of those pictures we've all seen too much on television before when a building was deliberately destroyed by well-placed dynamite to knock it down. And I turned in time to see what looked like a skyscraper implosion. It looked like it had been done by demolition crew. The whole thing just collapsed and gone on itself. We heard this sound. It sounded like a clappest under. Well, it looked like there was a shock wave ripping through the building and the windows all busted out. It was almost as if it were a planned implosion. It just pan-caped. Pan-caking almost like a precision implosion. Ironically, the building had housed the city's emergency management office. I don't know whether it was accomplished by demolition experts. Watching an old building being demolished and they wired very carefully for days. And it's a very careful operation in order to make sure that a building comes down safely. That's what it looks like happened to Building 7. I certainly am much more open-minded about it than I was. And it is because of the involvement of the 9-11 families and all these engineers and architects. This is Building 7 in the World Trade Center area is collapsing. We don't even know whether this was something that was engineered for safety reasons or it just happened. Can you confirm it was number 7 that just went in? Yes, sir. And you guys knew this was coming all day. We had been hurt, report, that the building was unstable. And that eventually we needed to come down on its own. Or it would be taken down. We all thought for sure a bomb was set to explode underneath our feet. Outside 7 World Trade Center. It was in a abrupt, total and complete collapse at the speed of free fall. They told us Building 7 was coming down. I do believe that they brought Building 7 down because I heard that they were going to bring it down. Did they actually use the word brought down and who was it that was telling us? In the fire department. And they did use the word. We're going to have to bring it down. What's going on? Right now we've told that 7 World Trade Building is being evacuated. You got to stay behind this line because they're thinking about taking this building down. Building 7 came down. Many emergency vehicles making their way into Manhattan, including one thing we see if we show the video here. So a demolition truck carrying construction equipment. That equipment is going towards presumably down to downtown. We are getting information now that one of the other buildings, Building 7, in the World Trade Center complex is on fire and has either collapsed or is collapsing. The 47 story Salomon Brothers Building, situated very close to the World Trade Center, has also just collapsed. More on the latest building collapse in New York, you might have heard a few moments ago, was talking about the Salomon Brothers Building collapsing. And indeed it has. I'll tell you about the Salomon Brothers Building and its collapse. As you can see behind me, the presumably there were very few people in the Salomon Building when it collapsed. We are getting word from New York right now that another building has collapsed to understand that this is a 47 story building on a Tuesday. That's information. Of course, take a look at that right hand side of the screen. It's going down right now. There it is. Yeah, it went down right there. I remember getting a call from the fight upon commander telling me that they were not sure they're going to be able to contain the fire. I said, you know, we've had such terrible loss of life. Maybe this amount of things do is pull it. And they made that decision to pull and then we watched the building collapse. World Trade Center 7th, the leaseholder of the World Trade Center complex Larry Silverstein. He said that they pulled that building, which is a demolition term for intentionally breaking that ability. I remember when it was in danger and I think that they made a decision based on the danger that they had to destroy them. And the things that they did at the control of fashion. We've got to rebuild several trade centers. And we've got to do it fast. Next thing, you know, we've got the designs of a building. And the first design meeting was in April of 2000. And construction began shortly thereafter in 2002. We're backed by 9-11 family members and other concerned citizens who are calling for an independent, unbiased investigation. As an engineer, I have three degrees in engineering. I signed that petition for architects and engineers for 9-11 truth some time ago, because the American people absolutely need the truth of 9-11. I'm a family member trying to find out the answers to the murder of 3,000 plus people. It's distressing for everyone to come to terms with this evidence. But we must pursue the truth wherever it leads. Look at the evidence and decide for yourself. Of course, our focus is on the science of what happened. We want to know how did 400 structural steel connections give way every second during the seven-second free fall collapse of World Trade Center 7.