wow this thread is full of stupid posts... i'll add one:

_ Anyone thinking there is a conspiracy theory in 9/11 is wrong/gullible/ret***** .... the way the buildings fell is totally normal, why would you expect any other direction? the building actually broke evenly because the few enflamed floors broke at the same time.... making a nice 20 story block fall 30 meters onto the remainter of the structure, crumbling all the pillars and fondations. Have you even seen a building being taken down? do you think it tips over? no they blow up the foundations and it cumbles, here the 20 top stories acting as a hammer served as the "dynamite" on the foundations and the inside structure.

_ anyone saying america "deserved it" or are "responsable for it" are the product of modern media overflow that creates heaps of sheeps to folow their will... product of propaganda. The mob is dumb and they are proof of it.

_ What exactly has america done before 9/11.... umh...yeah but besides that.... ah ok... yeah so you hate the us for either a)saving europe from nazism b) preventing asia to be under full faschist Japan's control d) cause stalin didn't like them. No? oh for the iraq war... yeah so you hate them and say 9/11 is justified because after 9/11 they invaded iraq.... right cause in school you get a 0 before you even take the test is that it? yeah ok very rational, love your way of (not) thinking guys...

(on the mosque.... I believe it is used as provocation by some muslims, and as such has no place to be there. Unfortunately for the moderate muslims, the visible part of the population is the one that wants to be seen... the fanatically absurd one.)

and on suicide bombers being educated.... are you gyus refering to the doctor that tried to blow up an airport? putting fire to his car with a bomb, only to have the bomb not explode and him being badly burnt? Funny how the smart people mess up so bad isn't it? It's not because you're educated that you're smart, it helps, but not that much.

The Twin Towers collapsed because of the heat cause by the burning jet fuel on the structural steel. Obviously the terrorists had studied engineering and knew what it took to bring them down.

Those towers are the first buildings in the history of our world to fall due to a plane hitting them.  The top floors breaking and falling would not cause the entire building to fall.  Each floor, starting from the bottom is built to hold the weight of the next floor.  It wasn't normal as the planes hit the buildings on a specific side each.  Those sides would have fallen first.  I've seen buildings demolished and in order for them to fall the way that the towers did, they needed explosives near the bottom of the building and more going up.

Heat from the jet fuel, I've heard that one before.  And there were reports of firefighters as high up as a few of the floors that were supposed to be "too hot" to be on.  It's a myth pure and simple.  There has never been a building to fall from a plane crash in the history of the world until 9/11 (even after).  Can anyone here even exlplain why Tower 7 fell, and fell at near freefall speed as well?  Nope.

Your last sentence makes me think you might be acting sarcastic, if so, sorry.  If not, grrrrrrrrr.

take a hammer, put it on a spagetti... the spagetti doesn't break.

take the same hammer, but hit the top of the spagetti with it... the spagettin shatters.

that's what happened to the foundations and the whole structure when the top floors fell.... I have no idea of the weight of 20 floors of WTC .... but i'm pretty sure it was pretty damn heavy when used as a hammer on the rest of the building.

THe floors are indeed made to hold the weight of the top floors, and have a reasonable security margin... I just highly doubt that a mountain falling on top of the building was taken into account in these calculations.

if you look at a video, you'll see the top floors fall, and the rest follow, not a fall starting from the bottom.

http://www.youtube.com/watch?v=smreRx51cus&feature=related

and see how the smoke kind of preceeds the top block, that is consecutive floors shattering as they get hit.... though they start to shatter lower and lower, on 0:07 you can see a little puff of smoke comming out of a lower floor, that's the stress being repercuted downwards and shattering additional structure.

7 is north or sourth?

South had a bigger hammering weight as it had more floors hitting it... take a huge happer and slam a table... it'll seem it falls at freefall speed too.

North tower had less weight, the hammer may not have been the effect all the way down, in fact the fall was probably highly helped with the fall of the south tower which weakened the foundations of the north tower.

Heck my cousin was working in a building next to the WTC and they had to vacate the office indefinitely, because the structural integrity of the building had been compromised.... that's a building that wasn't hit at all, so a weakening of the north tower by the fall of the south one is just about a certainty.

Ok, your hammer hit the top of your noodles but the planes didn't hit the top of the buildings, they hit them on the side.  And yes, it was close to the top.  There was no mountain falling on the buildings as the planes had already hit. No building in history has every fallen from a plane hitting it. 

When I look at the video I see a near freefall motion, as if a controlled demolition occured. Watch some of those and you will see.

Wow, ok, tower 7 is neither of the "tall" buildings, it is in fact a third building all alone, but close to those two.  It was said that it fell due to the fire and damange due to the structure, which would make it the first building in the history of our world, once agian, I state somthing like this, to fall from that form of damage.

And I forgot to add that Tower 7 fell at near freefall speed as well, but why?  The only posible answer to this is a controlled demolition.

you didn't understand a thing to my hammer example....

1) the planes hit.... destroy 5-6 floors.

2) it burns for 45 mins

3) weight of top floors is too great for weakened material (both plane crash and burning weakened the 5-6 floors)

4) the 5-6 floors collaps

5) The 30 floors ABOVE the crash site are still intact, but they have nothing under them now, so they fall

6) the 30 floors abonve hit the rest of the tower, acting as a gazzilion ton hammer (the mountain).

7) everything shaters as the shockwave goes down the building

8) as it falls, the top of the tower encounters little resistance from the shockwaved shattered structure and seemingly freefalls, it falls just about as fast as the shockwave propagates.

Notice how the amount of smoke increases and comes always from under the falling part?

If that doesn't help you understand the processus... then just forget I said anything....

It's basic physics.  It's why people who have actual arhitectural degrees don't question a plane felling a tower.

Let alone people who stack pallets in wharehouses.