“I saw a flash flash flash [at] the lower level of the building. You know like when they demolish a building?”--Assistant Fire Commissioner Stephen Gregory
“[I]t was [like a] professional demolition where they set the charges on certain floors and then you hear 'Pop, pop, pop, pop, pop'."--Paramedic Daniel Rivera
The above quotations come from a collection of 9/11 oral histories that, although recorded by the Fire Department of New York (FDNY) at the end of 2001, were publicly released only on August 12, 2005. Prior to that date, very few Americans knew the content of these accounts or even the fact that they existed.
The day after 9/11, a story in the Los Angeles Times, referring to the south tower, said: “There were reports of an explosion right before the tower fell, then a strange sucking sound, and finally the sound of floors collapsing."
A story in the Guardian said that “police and fire officials were carrying out the first wave of evacuations when the first of the World Trade Centre towers collapsed. Some eyewitnesses reported hearing another explosion just before the structure crumbled. Police said that it looked almost like a ‘planned implosion.’"
“Planned implosion” is another term for controlled demolition, in which explosives are placed at crucial places throughout a building so that, when set off in the proper order, they will cause the building to come down in the desired way. When it is close to other buildings, the desired way will be straight down into, or at least close to, the building’s footprint, so that it does not damage the surrounding buildings. This type of controlled demolition is called an “implosion.” To induce an implosion in steel-frame buildings, the explosives must be set so as to break the steel columns. Each of the Twin Towers had 47 massive steel columns in its core and 236 steel columns around the periphery.
To return now to testimonies about explosions: There were many reports about an explosion in the basement of the north tower. For example, janitor William Rodriguez reported that he and others felt an explosion below the first sub-level office at 9 AM, after which co-worker Felipe David, who had been in front of a nearby freight elevator, came into the office with severe burns on his face and arms yelling "explosion! explosion! explosion!"
Rodriguez’s account has been corroborated by José Sanchez, who was in the workshop on the fourth sub-level. Sanchez said that he and a co-worker heard a big blast that “sounded like a bomb,” after which “a huge ball of fire went through the freight elevator.”
Engineer Mike Pecoraro, who was working in the sixth sub-basement of the north tower, said that after an explosion he and a co-worker went up to the C level, where there was a small machine shop. “There was nothing there but rubble,” said Pecoraro. “We're talking about a 50 ton hydraulic press--gone!” They then went to the parking garage, but found that it was also gone. Then on the B level, they found that a steel-and-concrete fire door, which weighed about 300 pounds, was wrinkled up "like a piece of aluminum foil." Having seen similar things after the terrorist attack in 1993, Pecoraro was convinced that a bomb had gone off.
Given these testimonies to explosions in the basement levels of the towers, it is interesting that Mark Loizeaux, head of Controlled Demolition, Inc., has been quoted as saying: “If I were to bring the towers down, I would put explosives in the basement to get the weight of the building to help collapse the structure.”
Some of the testimonies suggested that more than one explosion occurred in one tower or the other. FDNY Captain Dennis Tardio, speaking of the south tower, said: "I hear an explosion and I look up. It is as if the building is being imploded, from the top floor down, one after another, boom, boom, boom."
In June of 2002, NBC television played segments from tapes recorded on 9/11. One segment contained the following exchange, which involved firefighters in the south tower:
Official: Battalion 3 to dispatch, we've just had another explosion.
Official: Battalion 3 to dispatch, we've had additional explosion.
Dispatcher: Received battalion command. Additional explosion.
Firefighter Louie Cacchioli, after entering the north tower lobby and seeing elevator doors completely blown out and people being hit with debris, asked himself, “how could this be happening so quickly if a plane hit way above?” After he reached the 24th floor, he and another fireman “heard this huge explosion that sounded like a bomb [and] knocked off the lights and stalled the elevator.” After they pried themselves out of the elevator, “another huge explosion like the first one hits. This one hits about two minutes later . . . [and] I’m thinking, ‘Oh. My God, these bastards put bombs in here like they did in 1993!’”
“Pops”
As before, “pops” were reported by some witnesses. “As we are looking up at the [south tower],” said firefighter Joseph Meola, “it looked like the building was blowing out on all four sides. We actually heard the pops. Didn't realize it was the falling--you know, you heard the pops of the building. You thought it was just blowing out."
“Pops” were also reported by paramedic Daniel Rivera in the following exchange:
Q. How did you know that it [the south tower] was coming down?
A. That noise. It was noise.
Q. What did you hear? What did you see?
A. It was a frigging noise. At first I thought it was---do you ever see professional demolition where they set the charges on certain floors and then you hear 'Pop, pop, pop, pop, pop'? That's exactly what--because I thought it was that. When I heard that frigging noise, that's when I saw the building coming down.
http://www.thetruthseeker.co.uk/article.asp?ID=4131
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