@mm< I have already pointed out the facts of WTC 7, but I will repeat them. Buidling three didn't *not* have the supposed perfect collapse you claim the official story claims (which it doesn't).
From wikipedia:
As the North Tower collapsed on September 11, 2001, heavy debris hit 7 World Trade Center, damaging the south face of the building[29] and starting fires that continued to burn throughout the afternoon.[8] The collapse also caused damage to the southwest corner between Floors 7 and 17 and on the south face between Floor 44 and the roof; other possible structural damage included a large vertical gash near the center of the south face between Floors 24 and 41.[8] The building was equipped with a sprinkler system, but had many single-point vulnerabilities for failure: the sprinkler system required manual initiation of the electrical fire pumps, rather than being a fully automatic system; the floor-level controls had a single connection to the sprinkler water riser; and the sprinkler system required some power for the fire pump to deliver water. Also, water pressure was low, with little or no water to feed sprinklers.[30][31]
After the North Tower collapsed, some firefighters entered 7 World Trade Center to search the building. They attempted to extinguish small pockets of fire, but low water pressure hindered their efforts.[32] Over the course of the day fires burned out of control on several floors of 7 World Trade Center, the flames visible on the east side of the building.[33][34] During the afternoon, fire was also seen on floors 6–10, 13–14, 19–22, and 29–30.[29] In particular, the fires on floors 7 through 9 and 11 through 13 continued to burn out of control during the afternoon.[35] At approximately 2:00 pm, firefighters noticed a bulge in the southwest corner of 7 World Trade Center between the 10th and 13th floors, a sign that the building was unstable and might collapse.[36] During the afternoon, firefighters also heard creaking sounds coming from the building.[37] Around 3:30 pm FDNY Chief Daniel Nigro decided to halt rescue operations, surface removal, and searches along the surface of the debris near 7 World Trade Center and evacuate the area due to concerns for the safety of personnel.[38] At 5:20:33 pm EDT the building started to collapse, with the crumble of the east mechanical penthouse, and at 5:21:10 pm EDT it collapsed completely.[1][39] There were no casualties associated with the collapse.
As far as the temps inside and the failure of the steel, they most certainly were hot enough to cause the steel to fail. Steel begins to lose it's ability to support a load at as low as 650 degrees F. I'm sure you are about to quote either the 1500 degree number (steel actually melts at 1500) or a 1000+ number, but by that time (1000 degrees F) steel has lost 80% or more of it's load bearing capacity and would already have collapsed under the weight of the floors above it. A little research and logic shows that at the temperatures of jet fuel *and* the plastics and other common chemicals in a typical office environment, the steel would easily have failed under the load of the floors above it.
As far as it's collapse down the center instead of toppling sideways, that was an element of it's design to begin with. So unless they planned this attack back in the 60s, the fact it came straight down would have no bearing on the supposed conspiracy. The WTC was designed differently from many other skyscrapers.
Finally, please provide even one other example of a skyscraper hit head on by a commercial jet airliner. I am honestly interested if you can. I can't find one.