Thanks for your precisions, tfk. I guess you're right.
From an other part, just to check:
None of these firefighters or medical staff support the twoof movement, do they?
(Another twoofer who brought me that list after I pointed him to
this famous thread).
Somewhere around the middle of the World Trade Center, there was this orange and red flash coming out. Initially it was just one flash. Then this flash just kept popping all the way around the building and that building had started to explode. The popping sound, and with each popping sound it was initially an orange and then a red flash came out of the building and then it would just go all around the building on both sides as far as I could see. These popping sounds and the explosions were getting bigger, going both up and down and then all around the building.
http://graphics8.nytimes.com/packages/pdf/nyregion/20050812_WTC_GRAPHIC/9110192.PDF New York Times
Stephen Gregory -- Assistant Commissioner (F.D.N.Y.) We both for whatever reason -- again, I don't know how valid this is with everything that was going on at that particular point in time, but for some reason I thought that when I looked in the direction of the Trade Center before it came down, before No. 2 came down, that I saw low-level flashes. In my conversation with Lieutenant Evangelista, never mentioning this to him, he questioned me and asked me if I saw low-level flashes in front of the building, and I agreed with him because I thought -- at that time I didn't know what it was. I mean, it could have been as a result of the building collapsing, things exploding, but I saw a flash flash flash and then it looked like the building came down.
...
[It was at] the lower level of the building. You know like when they demolish a building, how when they blow up a building, when it falls down? That's what I thought I saw.
...
He said did you see anything by the building? And I said what do you mean by see anything? He said did you see flashes? I said, yes, well, I thought it was just me. He said no, I saw them too.
...
I know about the explosion on the upper floors. This was like at eye level. I didn't have to go like this. Because I was looking this way. I'm not going to say it was on the first floor or the second floor, but somewhere in that area I saw to me what appeared to be flashes.
http://graphics8.nytimes.com/packages/pdf/nyregion/20050812_WTC_GRAPHIC/9110008.PDF New York Times
http://911research.wtc7.net/wtc/evidence/oralhistories/explosions.html
Journalist Pete Hamill:“We heard snapping sounds, pops, little explosions, and then the walls bulged out, and we heard a sound like an avalanche.”[New York Daily News, 9/11/2001]
Firefighter Keith Murphy, who is in the lobby of the North Tower:“[T]he first thing that happened, which I still think is strange to me, the lights went out.… I had heard right before the lights went out, I had heard a distant boom boom boom, sounded like three explosions.… At the time, I would have said they sounded like bombs, but it was boom boom boom and then the lights all go out.… I would say about 3, 4 seconds, all of a sudden this tremendous roar.”[City of New York, 12/5/2001]
Firefighter Craig Carlsen hears “explosions coming from building two, the South Tower. It seemed like it took forever, but there were about ten explosions.… We then realized the building started to come down.”[City of New York, 1/25/2002
Firefighter Thomas Turilli, who is in the lobby of the North Tower:“[A]ll of a sudden you just heard like it almost actually that day sounded like bombs going off, like boom, boom, boom, like seven or eight, and then just a huge wind gust just came… It just seemed like a huge explosion.”[City of New York, 1/17/2002]
Paramedic Kevin Darnowski:“I heard three explosions, and then we heard like groaning and grinding, and Tower Two started to come down.”[City of New York, 11/9/2001]
Police officer Sue Keane, who is an Army veteran, is located in the north WTC tower:“
t sounded like bombs going off. That’s when the explosions happened.… It started to get dark, then all of a sudden there was this massive explosion.”[Hagen and Carouba, 2002, pp. 65]
http://www.youtube.com/watch?v=cZ4dVo5QgYg Firemen's Testimony- Study