in the debate over the destruction of the world trade center two important organizations have played a major role one is nist the national institute of standards and technology which was officially tasked by the u s government to investigate the collapse of the three skyscrapers in two thousand and five nist presented their final report on the collapse of the twin towers and in two thousand and eight the one on building seven for the twin towers nist concluded that they were brought down by the consequences of the impacts and the ensuing fires while building seven according to nest was brought down primarily by fire alone in other words they fully confirmed the official version by the us government the other organization to bear weight on the debate has been architects and engineers for nine eleven truth and association of professionals in civil construction founded in two thousand and six by san francisco architect richard gauge about architects and engineers lists over two thousand experts in structural engineering science of materials architectural design fire protection science of construction metallurgy and even experts in controlled demolitions since they've entered the fray architects and engineers has brought to the table a solid amount of scientific information refuting the official explanation by nist on the collapses and confirming t theory of controlled demolitions instead at the same time architects and engineers has acted as an unrelenting watchdog for every action taken by nist pointing out every single error in their work and even forcing them in some cases to make had made extensive efforts to depict them as extremely light and fragile buildings the outside of each tower was covered by frame a fourteen inch wide steel columns some of the steel columns were forty inches apart these exterior walls bore the majority of the weight of the building the interior core of the buildings was a hollow steel shaft in which elevators and stairwells were  all of you was off as we shall see all these statements are false contrary to traditional skyscrapers where all the support columns are equally spaced in the twin towers part of the supporting columns had been moved towards the exterior wall creating a large column free space available for rental for this reason the external structure had literally become a grid of steel columns made with prefab or box that were mounted on site these are the thin steel nerves mentioned by debunkers alberto angela two hundred forty four steel columns place to proximately two feet apart which supported forty percent of the weight of the towers far from being empty parallel appends the internal structure was comprised of forty seven steel columns so long and sturdy that a special factory in japan had to be built in order to assemble them it was the core structure to support the majority of the weight of the building sixty percent of it and not the external structure the core structure seen on the left is what the nine eleven commission has called a hollow steel shopped this is the same core structure near the base of the tower the core structure was an actual extremely robust steel skyscraper built within another skyscraper the core structure how's the stairs the elevators and all other services needed for the functioning of the towers the inner walls of the core structure were made of simple layers of sheet rock a long series of steel trusses connected the core structure to the external one and supporting the floors the floors were also prefabricated rectangular pieces covered by a thin layer of concrete the internal and external structure connected through an umbrella like structure called the hap truss which kept together the towers and bound them from above the idea that this kind of structure is fragile and therefore no longer used after nine eleven is disproven by the new building seven built by larry silverstein a strong central structure supports the majority of the weight of the building long steel beams support the floors and connect the core structure to the external one allowing for a large column free space in between a very similar concept to the one used in the twin towers most importantly the debunkers forget to mention that the twin towers were built with the structural redundancy of three to five times the weight they were meant to support the structure was capable of holding three to five times the way these buildings are built to columns made it one of the most redundant and one of the most resilient skyscrapers on the same subject the architectural firm of rock and suns wrote the building as designed is sixteen times different than a conventional structure the very deal trusses would be so effective according to the engineers calculations that all the columns on one side of a tower could be cut as well as the two corners and several columns on the adjacent sides and the tower would still be strong enough to withstand a hundred mile per hour w the structural engineer who designed the twin towers stated live loads on these perimeter columns can be increased more than two thousand percent before failure occurs in particular the twin towers were designed to sustain the impact of a large airliner traveling at six hundred miles per hour and still remain standing interviewed in one thousand nine hundred three by the seattle times john skilling stated we looked at every possible thing we could think of that could happen to the buildings even to the extent of an airplane hitting the side  analysis indicated the biggest problem would be the fact that all the fuel from the airplane would dump into the building there would be a horrendous fire a lot of people would be killed the building structure would still be there and it was after the impacts both towers remained standing showing no major effect on their stability furthermore nist has confirmed that the initial jet fuel fires themselves lasted at most a few minutes this means that from that moment on the only available source of fuel for the fires was common office furnishings and as we know regular office fires are not hot enough to affect the stability of a steel structures steel frame high rise building has ever collapsed due to fire in over twenty years i have not seen until recently a protected steel structure that has collapsed in a fire and these kinds of designs of performed extraordinarily well over history in fact until this occurrence no building had fallen down because of fire furthermore nis estimated the combustible fuel loading was somewhat lower than found in prior surveys the bop the spaces the number of interior walls and thus the minimal amount of combustible interior finish and limited bookshelf space account for much of the differences there was no reason for the towers to collapse at that point with a structure that had clearly withstood the impacts and with less than average office content to feed the fires both buildings should have remained standing allowing for the evacuation and rescue of everyone who had survived the initial impacts and the fires instead both buildings suddenly collapsed from top to bottom one fifty six minutes after the impact the other as much as one hour and forty two minutes after the impact of the plan the debate on the collapse of the twin towers centers around two major questions one is what caused the initial collapse of the top section of the building on the lower part of each tower the second is what caused the complete destruction of the remaining healthy structure below once the top section had collapsed on as far as what initiated the collapse but first we were told that the heat of the fires had softened and melted the structure of the building in two thousand and two no but depicted a scenario envisioned by many experts at the time that the truss connections failed and the extreme heat causing the floors to fall onto one another precipitating the collapse as the steel begins a softening structure of the towers collapsed furthermore experts pointed out that jet fuel produces barely half the heat needed to melt steel it would not have been enough to disconnect the trusses from the external structure it's not that it melts in a fire in fact at that point the official explanation backtracked and settled for a more generic weakening of the steel due to the fires you don't need to melt the steel columns you just need to start weakening them what we found is it doesn't take temperatures have to melt steel it just has to heat up the steel so it expands and then softens and weakens the structure until the collapses in the new explanation the initial failure was no longer blamed on the rupture of the steel trusses but on their sagging due to the heat the trusses stayed connected to the columns sacked from the heat they pulled on the columns in them inward nearly five feet in some areas until the columns reached the breaking point the impact of the airplanes widely dislodge the fireproofing from the trusses hastening the process that eventually caused them to sag it should be noted that nist made the dislodgement of the fireproofing a necessary condition for the towers to collapse the buildings would not have collapsed under the effects of the airplane impact and the fuel jet fuel ignited multi floor fires and it only reason it collapses because the fire proofing was dislodged but the theory of the sagging trusses created even more problems than the one before first of all there is no proof whatsoever that the fireproofing from the steel had been widely dislodged by the impacts as nist has maintained the steel structure of a skyscraper is elastic not rigid and  impacts by slowly swaying back and forth not by vibrating the building swayed slowly one way toward the hudson river to the west by the time it came back and i just jumped up and just had to get out of the elevator in fact there are good reasons to believe that the fireproofing from the steel was not dislodged at all as in the following example james glanz of the new york times when the plane hit the north tower between the ninety fourth and ninety eight  an engineer for the american viewers shipping was reading his e mail on the new first floor the plane hit thank you described as the biggest whammy ever heard but there wasn't much shaking his email was still there after the impact he was or was just below the point of impact if his pictures didn't even fall why should the spray on fireproofing have been detached from the steel trusses secondly there is no proof that the temperatures were high enough to seriously weaken the steel in any used their own computational model and they've never published the data from their simulation when architects and engineers asked to verify the computer model used by nist their request was denied the truth is that nist itself admitted in their own report to have no proof for temperatures high enough to seriously weakened steel from the nist report we read of the more than one hundred seventy areas examined on sixteen perimeter columns panels only three columns had evidence that the steel reached above two hundred fifty degrees centigrade or four hundred eighty degrees fahrenheit only two columns specimens had sufficient paint remaining to make such an analysis and the temperatures did not reach two hundred fifty degrees centigrade no conclusive evidence was found to indicate that pre collapse fires were severe enough to have a significant effect on the micro structure that would have resulted in weakening of the steel structure in other words nist openly admits to have no proof to support their own the in conclusion the known facts are still melts at about twenty eight hundred degrees fahrenheit softening can begin at about eleven hundred degrees fahrenheit except for three isolated spots nist admits to have found no proof of temperatures beyond four hundred eighty degrees fair right which is less than half the temperatures needed to seriously weakened steel on the other hand there is multiple evidence that the temperatures needed to seriously weakened steel were not reached for a sustained time in the twin towers the first one is that a group of sixteen people managed to descend through the area devastated by the impact without obviously being burned alive one of them is brian clark and when we came to the seventy eighth floor the last layer was but it was cracked and there were flames licking up the other side of the wall like this it wasn't a roaring inferno i said i sense that the flames were maybe starved for oxygen right there you know i mean interior we kept going and we got  the seventy fourth floor we got down that far the normal conditions the lights were on fresh air coming up from below has maintained that these people managed to survive because in that part of the building the stairwell runs on the side of the tower and r in truth stairwell a traverses to the side of the tower on the eighty second floor but clarke and his colleagues were on the eighty fourth this means they descended two floors in the center of the tower before crossing over further more one of clark's colleagues went back from the eighty first to the ninety first floor before descending all the way to the ground on different jessica who went in the eighty first floor with me he went up to ninety one caught up to the people laying down on the floor to thinking that there was fresher air at floor level he made his way back to the stairs and so i started to run down stairs and so i ended up on the ground level and i want to walk had there been a temperature of eleven hundred degrees around the stairwell nobody would have been able to go through it alive secondly there is a series of thermo graphic images shot with an infrared camera showing temperatures much lower than those needed to soften steel this is the north tower seen from below its nine eighteen about a half an hour after the impact of the first plane and the indicated temperatures do not reach the color yellow which means they don't exceed one hundred degrees centigrade or two hundred  twelve degrees fahrenheit and this is the south tower some fifteen minutes after the impact of the second plane here to the indicated temperatures do not exceed two hundred twelve degrees fahrenheit but the major problem with the sagging trusses theory is that it doesn't make any sense from a mechanical point of view even assuming the temperatures were high enough to make them sag to such an extent where did these relatively thin trusses find the strength to pull and then break apart a supporting structure much larger and stronger than they were the phenomenon suggested by nist is called thermal expansion if one assumes that the trusses were forced to expand downwards by the vertical structures resisting the push it means they were weaker than the structure and they would have never found the strength to it in words if instead the trusses sagged on their own so weakened by fire to become unable to support their own weight where would they find the strength to pull and break apart the same structure that had easily supported them when they were strong and healthy in either case the idea that the trusses alone would have been able to pull and break apart the external structure makes no sense as we shall see the external structure did bow in words before the towers collapsed but a much greater force than their own must have been applied to those trusses for them to be able to pull and break apart the structure of the attached question can you provide any evidence that the fireproofing from the steel trusses was widely dislodged by the impact of the planes which nist has made a necessary condition for the collapses to be caused by fire can you provide any evidence that the temperatures in the twin towers were high enough and lasted long enough to seriously weaken the steel in the areas where the initial collapses occurred can you explain how a sagging truss weakened by heat could pull and eventually break apart the structure it is attached to with no external force being applied to it if the explanation by nesta on what caused the initial collapse seems seriously flawed their explanation on what caused the complete destruction of the towers does not exist within more than ten thousand pages filled with technical data of relative importance in a footnote on page eighty two of the report we read the focus of the investigation was on the sequence of events from the instant of aircraft impact to the initiation of collapse for each tower for brevity of this report the sequence is referred to as the probable collapse sequence although it does not actually include the structural behavior of the tower after the conditions for collapse initiation reached and collapse became inevitable with the simple word inevitable nist purports to have explained the total destruction of eighty thousand tons of a perfectly healthy still structure upon itself the area below the damage zone where the planes flew in and where the fire was that area below that eighty or ninety stories eighty thousand tons of structural steel was not damaged in any way yet you were there and watched it destroy itself wiping out floor by floor all two hundred eighty seven structural columns as if they didn't exist under nice the  damage so when a well known debunking web site wrote to nest asking for a clarification on the sequence of the collapses it received a similar answer nist did not describe the specific sequence of events after global collapse initiated this did demonstrate that this is tantamount to saying once the pearl harbor attack initiated the video evidence shows that the us fleet was quickly overwhelmed by the japanese so we didn't feel the need to find out why it happened worked on a one dimensional model while he states the high tilt seen on the south tower top would call for a three dimensional model of progressive collapse in any case it is not up to private studies to explain the collapse of the twin towers missed receive twenty million dollars of taxpayers money to determine why and how world trade center one and world trade center two collapsed following the initial impacts of the aircraft and to this day they have not done so this is why architects and engineers has kept pressing nist asking them to publish their data in regards to the potential energy released during the downwards movement of the upper stories and the absorptive capacity of the intact structure below the collapse structural engineers do this every day this is not rocket science you have no weight of this building mass you have what are known columns below it you know order to resist it you let it go in your models and you calculate what the what the resistance is why didn't they do it could it be because they knew darn well that it would not have collapsed at all in fact it could be suggested that nist never explain the collapses by gravity alone because it would be impossible to do so without violating at least two of the most fundamental laws of physics one is newton's third law of motion which states that for every action there is an equal and opposite reaction this means that two opposing forces will neutralize each other in a head on collision the two cars absorb each other's kinetic energy and transform it into physical deformation or damage after that the system comes to a rest as there is no more energy to be dissipated the top section pushing on the bottom section it's going to meet equal forces as it goes both sections are going to be demolished at the same rate so by the time you've crushed  fifteen stories below the top fifteen stories are also going to be crushed and so there's nothing left now to crush the rest of the building something of this kind is what we should have seen when the top section of the towers collapsed on to the lower one lower sections should have mutually destroyed each other until all the energy is dissipated and the system comes to a rest alternatively as shown in this experiment with two towers made of snow the top section could have fallen off to the side after the initial collapse what could not have happened is this little tiny chunk of the building can't possibly fall and crush the entire structure below it this is such a simple fundamental concept that architects and engineers were astonished in seeing it totally ignored this is high school physics and our whole society is being led to believe that these fundamental laws of physics hard science don't apply anymore but even if we assume that the top section of the tower had enough potential energy to destroy the rest of the structure below it could not have done so at the speed it did which was near free fall speed that would have violated any even more important principle in physics known as the law of momentum conservation this law states that the total energy within an isolated system must always remain the same as we have seen the energy can be transformed within the system from motion to physical deformation but for the deformation to begin the velocity must decrease in order for one kind of energy to be transformed into the other no new energy can be added to the system one particular example of momentum conservation is free fall free fall happens when the only force applied on an object is gravity this means that all the potential energy contained by the object is converted into vertical motion as soon as the falling object hits an obstacle in breakage occurs the speed must decrease because some of its energy needs now to be converted into physical breakage it takes energy to break things apart and that energy must come from within the system that's the falling rock cannot keep falling at freefall speed and break apart at the same time because it doesn't have enough energy to do both let's go now to the twin towers and ask a simple question assuming the top section on the left contains enough potential energy to destroy the rest of the tower and assuming we dropped both upper sections of the same time which one would hit the ground first it would be the second  of course as it finds no obstacles in its path the section on the right would quickly accelerate to freefall speed and maintain it all the way to the ground the section on the left instead needs to use some of its energy to destroy the structure below so it could never achieve freefall speed in the case of the twin towers however both upper sections fell with an acceleration close to freefall speed as if their path had been practically free from obstacles it took each tower between ten and twelve seconds to collapse to the ground while in absolute freefall time would have been nine point two seconds in other words both upper sections of the towers found enough energy to destroy eighty thousand tons of healthy structure below whil accelerating to near free fall speed this is as we have said absolutely impossible by gravity alone the law of momentum conservation won't allow it the building cannot do freefall with huge structural steel structural system in place to support it the one towers couldn't could not have come straight down through the resistance of eighty thousand tons of structural steel at this bid of freefall the jets would not happen if in fact it actually hit and made an impact was effectively crushing anything pushing hard on this core structure below the core structure is going to push back equally hard and that's what's cause the top section of the building to slow down as energy is drained away from the system to deformed those members it would slow down the descending mass and corps descend at less than thre way for those buildings to have collapsed at the speed they did the buildings fall at a speed which can only occur if the structure has been removed the vertical structure the same shyam sunder from nist has acknowledged that freefall can only be achieved with the absence of the structure below freefall time would be an object that has no structural components below it but could have removed the supporting structure below since the falling section didn't have any extra energy to do so the fact that it's coming so all of the energy is being used to just make it go straight down which means it's coming down through itself and not breaking up the building as it goes something else has to be clearing the way there is only one known way to allow that kind of acceleration while removing the supporting structure of building cannot do freefall without it being blown up that's the only way it could come down in freefall the only way that a building can accelerate as it collapses is by having pre engineered precisely timed and precisely placed explosives in other words controlled demolition that we couldn't count with them as it's very difficult to establish the exact a ration of a collapse by listening to the sounds only furthermore a couple of seconds more or less would not make a big difference as the time for the transfer of momentum between each collapsing floor must be considered anyway so a war impacting on a floor below would transfer a momentum and now floor those wars transpiring would transfer momentum so that such that the twin towers if you didn't have any columns whatsoever it would still take a minimum of thirty seconds for these towers to collapse just by turning three in the middle of the floor in any case the near freefall speed of about ten seconds has been confirmed by different official sources the nine eleven commission wrote that the south tower collapsed in ten seconds mr sunder from nist has confirmed similar timings measurements have indicated that tower one collapsed in about eleven official report since the stories below the level of collapse initiation provided little resistance the building section above came down essentially in free fall at this point we can pose the following question given that the building section above came down essentially in free fall given that for freefall to occur no supporting structure must be present and given that the falling sections didn't have any extra energy to destroy the structure below can you suggest anything different from some kind of controlled demolition for the removal of the supporting structure which was necessary for near free fall speed to be achieved at this point one may wonder what the response by the debunkers has been to all the scientific arguments presented by architects and engineers there has been no response all the debunkers have done is to either be little this association of professionals or to ignore it have to be simone has never responded to their arguments either but the most shocking statement comes from popular mechanics in their book to bunk nine eleven myths they wrote not one of the leading conspiracy theorists has a background in engineering construction or related fields this statement appears both in the original publication dated two thousand and six and in the revised edition published in two thousand and eleven by then architects and engineers have been active for almost five years listed more than thirteen hundred experts in civil engineering have made presentations in twenty different countries in the world and had been on national television several times but what caught my eye is their claim that more than thirteen hundred architects and engineers examine the evidence about building seven schools and disagree with the official report issued by the national institute of standards and technology i certainly am much more open minded about it than i was and it is because of the involvement of the nine eleven families and all these engineers and architects clearly they know more than i do the truth is that from the moment architects and engineers has entered the fray it's not one of their scientific arguments disproving the official version and confirming the theory of controlled demolitions has been refuted in any way by the doctors or by anyone else that's now returned to the previous question which is still unanswered what caused the initial collapse of the upper section of the towers under the rest of the building as we seen there was a blowing of the facade before the collapse but the trusses didn't have any strength of their own to cause such a massive bending of the external structure if explosives were used however and this part of the core structure was made to collapse first then the trusses would have had enough strength to pull along the facade and to initiate the global collapse in fact it was observed that the intent from the north tower begins dropping slightly before the top section of the building collapses which indicates the central structure was destroyed first even though a controlled demolition seems the only valid explanation for the collapses the debunkers have brought different arguments against this possibility the first argument is that it would have been impossible to place the a major renovation of the elevator system in both towers was undertaken from the march two thousand and one issue of elevator world we read elevator undertook what was perhaps one of the largest most sophisticated elevator modernization programs in the industry's history at new york city's prestigious world trade center no one is suggesting that this company had anything to do with the possible planting of explosives but such an extensive renovation process would have certainly provided the cover for a special team to access the internal structure of the buildings at any given could be moved around and it sounded like a dumpster so with be moved around and i got scared because i knew it was an empty floor nobody was supposed to be there as a matter of fact not even the elevators stop there you have to have special access key to open the door on the thirty fourth floor thirdly after the nine hundred ninety three attack bomb sniffing dogs had been adopted in the security system of the twin towers but on thursday september the sixth bomb sniffing dogs were abruptly removed according to a security guard with no apparent reason and lastly there was an unprecedented power down in the south tower on the very weekend before nine eleven for the first time in thirty years all the security systems in the building had become useless at the same time people could come and go as they pleased even in protected areas without being seen nor recorded by surveillance cameras the previous weekend been a power down because of the power down there was a complete breakdown of security that we can we are guided tours coming into the security areas by mistake and nobody thinking it up because there's no intrusion alarms or or anything else scott forbes was also present during the power down there was a power down in the south tower on the weekend of the eighth and ninth of september when the gist of it that camera security it would  excuse that the port authority gave you scott for this thirty six hour period of the power being down in the south tower the explanation was that there was exercise to increase the explosives without being noticed but with the proper cover story it could have been done under everyone's eyes in full daylight without anybody even questioning what was going on another argument by the developers is that controlled demolitions they say always begin from the bottom while the destruction of the twin towers clearly started from the top controlled demolitions always be confirmed by the building you cut the bottom columns and then the building falls if you look at the world trade centers both of them began at the impact ones where the plane to take all of that thought about that allowed them into it every controlled demolition can be designed according to the needs in fact sometimes it's not a good idea to start from the bottom this brings us directly to the issue of explosions in the same interview where he praised the solidity of the twin towers john skilling stated i'm not saying that properly applied explosives shaped explosives of that magnitude could not do a tremendous amount of damage i would imagine that if you took the top expert in that type of work and gave him the assignment of bringing these buildings down with explosives i would bet that he could do it on september eleventh there were dozens and dozens of loud explosions reported by firefighters policemen journalists and regular citizens both before and during the collapse of both towers for all these explosions however the debunkers have a blanket explanation the witnesses were confused they were not real explosions  was an explosion sound like most people don't know because most people never heard one so any sharp loud bang and that's probably an explosion the fact is most of the explosions were reported by firefighters and policemen and no one knows how to histories rendered in the voices of five hundred three firefighters and emergency personnel who present at the trade center on september eleventh over one hundred of them one fifth of the total has reported explosions in the buildings prior or during the collapses proceeding one thing should be known about controlled demolitions just like the twin towers most modern buildings are built with a high redundancy factor in terms of structural strength for this reason a series of preliminary explosions is normally needed in controlled demolitions to weaken the structure before the actual collapse can be induced obviously in the case of the twin towers it would not have been possible to set off the preliminary explosions all at once just before the collapse to make them less noticeable it would have been wise to set them off at separate intervals any time between the impacts of the planes and the collapse  towers for this reason it's important to keep in mind the exact chronology of the events eight forty six first impact into the north tower nine o three second impact into the south tower nine fifty nine collapse of the south tower ten twenty eight collapse of the north tower five twenty in the afternoon collapse a building seven witnesses normally call first explosion the one that came with the impact of the planes well they call secondary explosions all those that took place in aircraft impacted according to several witnesses there was a secondary explosion that took place in the basement of the north tower just before the plane hit the building at eight thirty he says he was headed to level before in tower one four stories below whatever happened it threw me to really don't remember a second explosion separate from the first i was racing i was going towards a bathroom all the sudden i show up at the door i didn't know it was a bathroom and always saw it in a big impact happen again and all the ceiling tile was falling down  light fixtures were according to the nine eleven commission it was the jet fuel pouring down the elevator shafts that caused the explosion in the basement from the final report we read a jet fuel fireball erupted upon impact and shot down at least one bank  years the fireball exploded into numerous lower floors including the before level four stories below the ground but the witnesses described an explosion that took place in the basement before the impact of the plane  the generators of the building that maybe a generator just blew up in the basement now twenty years in the building you know something that comes from the bottom something that comes from the top i want i went to verbalize that it was a generator we're here nine seconds from each other during the business meeting that was taking place in a building near by one liberty pl when faced with this precise question the editors of popular mechanics chose not to answer it and fell back on the generic explanation of the jet fuel in the elevator shaft as well you guys explanation is for real iranians testimony that he explorer they heard actors before empire state building crash back in one hundred forty five but the explanation of the jet fuel in the elevator shaft has several problems of its own first of all there were no regular elevators connecting the basement to the top levels of the towers each tower consisted of separate buildings built on top of one another each with their own elevator system there are only two elevators connecting the lobby to the forty fourth and seventy eighth floor but the plane struck on the ninety fifth floor which means the fuel could not  consideration the ball humans involved each tower had an approximate volume of two million one hundred sixty thousand cubic yards the planes that hit the towers carried an estimated ten thousand gallons of fuel each at the time of impact ten thousand gallons is the equivalent of fifty cubic yards this in scale graphic shows what fifty cubic yards look like next to the volume of the towers assuming that about half of the fuel was consumed in the initial explosion we would be left with some twenty five cubic yards of fuel available for most of this fuel is needed to ignite the fires at different floors as explained by mr meggs himself jets crashed into buildings they crashed at an angle which meant the killer wings which is where they store most of the fuel cut through multiple floors so they splash fuel and debris across multiple floors of the building igniting fires so even assuming that for some strange reason five of those cubic yards were all to end up in the only elevator shaft that goes all the way to the bottom of the tower there wouldn't be enough to reach the basement and significant quantities your typical ten foot by thirty inch backyard pool contains roughly one thousand gallons of water which is the equivalent of five cubic yards imagine dumping the water from this pool into this kind of elevator shaft with a drop of more than a thousand feet below and you'll get the idea of how much fuel can actually reach the bottom in any case the fuel in the elevator shaft theory could never account for the powerful explosion that literally devastated the lobby of the north tower one hour after in fact these firemen reported three large explosions in tower one which took place after the planes impact they also confirmed it was the third explosion to devastate the lobby of the tower it took these witnesses about one hour to walk down from the eighty second floor to the lobby of the north tower after the impact of the player we got to the fourth  situation in the lobby was such that there was no doubt on what had happened the ladies that are with me were in the world trade center in the first building and escaped through the lobby where they report that they believe there was a bomb in the lobby we ran down the steps to the lobby that would hang above telling you where to go were all hanging it was it was unbelievably scary to look at firefighter john shroder was climbing the stairs of tower one when he heard the huge explosion from below up to the twenty fourth floor stairwell and all the sort of building over and fall in out of sight yes and then i was on the three tremendous explosions and everything started coming down and then there was a tight sequence of detonations during the collapse of the south tower which many described as firecrackers you heard a big part of the building explosions it was like you could hear the echoes of the explosions going off the different buildings in the store and they went there a little less than a second below the fire i saw