The FACTS about WTC 7 are not in dispute.
7 World Trade Center - Wikipedia, the free encyclopedia
The original 7 World Trade Center was 47 stories tall, clad in red exterior masonry, and occupied a trapezoidal footprint. An elevated walkway connected the building to the World Trade Center plaza. The building was situated above a Consolidated Edison (Con Ed) power substation, which imposed unique structural design constraints. When the building opened in 1987, Silverstein had difficulties attracting tenants. In 1988, Salomon Brothers signed a long-term lease, and became the main tenants of the building. On September 11, 2001, 7 WTC was damaged by debris when the nearby North Tower of the World Trade Center collapsed. The debris also ignited fires, which continued to burn throughout the afternoon on lower floors of the building. The building's internal fire suppression system lacked water pressure to fight the fires, and the building collapsed completely at 510 pm.[2] The collapse began when a critical internal column buckled and triggered structural failure throughout, which was first visible from the exterior with the crumbling of a rooftop penthouse structure at 5
33 pm.
Image showing "bridge style" construction over the substation.
NIST Explanation for the collapse.
The fire that burned out of control caused the floors to expand and and push a key girder out of alignment. The loss of support resulted in a buckling and that was the trigger that brought down the entire building.
That scenario is entirely consistent with the plausible one that I have provided for the towers themselves.
Perhaps you might try enrolling in a basic applied mathematics course at your local community college.
That debunked video is full of idiots & bullshit. Not one picture of molten steel. Maybe some red hot sheet metal or other substance, but no molten steel. That 9/11 cross was not molten steel fused during the collapse. Close up photos & documentation show it was factory made that way as a prefabricated part of the building structure. 
A 10-lb sledge hammer dropping 1 story or 10-ft creates a force of 10,000-lbs. That is 1,000 times the force the it took just to hold the hammer static in the air. The same goes for the building. The tower was built to hold less than 20 times its static downward force load at a given height. Now dropping a portion of the building 10-ft increased the downward force by 1,000 times. The aircraft took out 3 floors, So that initial collapse impact was likely after a 30 foot drop.
On top of that for every crushed floor the moving mass gained weight & mass. This kept on increasing the force as the building fell. So a building built to hold 20 times it's weight will give very little resistance to slow a force of 1,000 times it's weight.
A one pound hammer can dent 60,000 psi steel because it hits with a force greater than 60,000 psi.
A hammer is a force amplifier that works by converting mechanical work into kinetic energy and back.
In the swing that precedes each blow, a certain amount of kinetic energy gets stored in the hammer's head, equal to the length D of the swing times the force f produced by the muscles of the arm and by gravity. When the hammer strikes, the head gets stopped by an opposite force coming from the target; which is equal and opposite to the force applied by the head to the target. If the target is a hard and heavy object, or if it is resting on some sort of anvil, the head can travel only a very short distance d before stopping. Since the stopping force F times that distance must be equal to the head's kinetic energy, it follows that F will be much greater than the original driving force f — roughly, by a factor D/d. In this way, great strength is not needed to produce a force strong enough to bend steel, or crack the hardest stone.
Effect of the head's mass - The amount of energy delivered to the target by the hammer-blow is equivalent to one half the mass of the head times the square of the head's speed at the time of impact (E={mv^2 \over 2}). While the energy delivered to the target increases linearly with mass, it increases quadratically with the speed.
So these first responders and engineers are in in fact idiots and you debwunked them how exactly...?
A 10-lb sledge hammer dropping 1 story or 10-ft creates a force of 10,000-lbs. That is 1,000 times the force the it took just to hold the hammer static in the air. The same goes for the building. The tower was built to hold less than 20 times its static downward force load at a given height. Now dropping a portion of the building 10-ft increased the downward force by 1,000 times. The aircraft took out 3 floors, So that initial collapse impact was likely after a 30 foot drop.
On top of that for every crushed floor the moving mass gained weight & mass. This kept on increasing the force as the building fell. So a building built to hold 20 times it's weight will give very little resistance to slow a force of 1,000 times it's weight.
A one pound hammer can dent 60,000 psi steel because it hits with a force greater than 60,000 psi.
A hammer is a force amplifier that works by converting mechanical work into kinetic energy and back.
In the swing that precedes each blow, a certain amount of kinetic energy gets stored in the hammer's head, equal to the length D of the swing times the force f produced by the muscles of the arm and by gravity. When the hammer strikes, the head gets stopped by an opposite force coming from the target; which is equal and opposite to the force applied by the head to the target. If the target is a hard and heavy object, or if it is resting on some sort of anvil, the head can travel only a very short distance d before stopping. Since the stopping force F times that distance must be equal to the head's kinetic energy, it follows that F will be much greater than the original driving force f — roughly, by a factor D/d. In this way, great strength is not needed to produce a force strong enough to bend steel, or crack the hardest stone.
Effect of the head's mass - The amount of energy delivered to the target by the hammer-blow is equivalent to one half the mass of the head times the square of the head's speed at the time of impact (E={mv^2 \over 2}). While the energy delivered to the target increases linearly with mass, it increases quadratically with the speed.
there was no pancaking the top half was already disintegrating as it fell and much of the debris and pulverized concrete was projected outward so it could not have gained weight & mass with every crushed floor the moving mass there was met with a huge solid structure that would of offered a lot of resistance
[ame=http://www.youtube.com/watch?v=tejFUDlV81w]9/11 Experiments: Newton vs. NIST - YouTube[/ame]
This guy is deceiving you & you fell for it sucker. 1,000 x force resisted by a 20 x force will only slightly slow it's acceleration rate. The faster the fall, the more force is generated.
So these first responders and engineers are in in fact idiots and you debwunked them how exactly...?
This video has been debunked countless times just like free fall was debunked. Firemen are not engineers. The people in that video are clueless & show no evidence to back their claims. They confused molten metal with molten steel. They lied about the I-beam cross being 2 separate steel beams that were fused together during the collapse. You are an idiot for believing that crap.
