I came up with slightly different numbers, but they are close enough that I am not going to argue. We can both agree that there is some arbitrary numbers such as rounding to Mach 1, again nothing to be to concerned with.
What does bother me however is your starting point for missile fire. I would argue it is at least a second before it would have impacted the building. As seen in this video here. http://www.youtube.com/watch?v=wc4wsjKbYTQ&feature=related
Yes yes, let me guess, the grainy long shot video. I'll ETA in a bit.
ETA, yep, and what do we see? a 'flash'? No, a blush of light colouring at the trailing edge of the wing. If it is real and I were to guess, I'd say its a vapour due to the extreme speed and the manouvering of the aircraft as it passed througha slightly more humid bit of air near the tower.
Of course you are going to argue that its a full second because you saw my numbers that showed a doubling of velocity and decided that was to your liking.
The missiles fly in formation about 1.5 meters from each other. That is going to garuntee that at least one will not even impact a perimeter column and thus you will not get this same effect. You could say that it would be reworked to have them fly in a tighter formation but now you will decrease(yes decrease) the effectiveness of the three warheads and will only cause damage to 1 column. Ok you say its one warhead to each of three columns. Now you have a very small warhead into a very large column and the problem of multiple laser targeting.
I also note that the warhead explodes inside the armoured vehicle. That's because all its kinetic energy needs to do is punch that 2 inch hole and then get the small amount of explosive inside to kill much softer targets, the crew. In the case of an aircraft a small hole and small explosion willsuffice to bring it down. This amount of damage to a perimeter column is negligible.
Yes and ONE column severed is going to make little difference. IIRC a couple of dozen perimeter columns were severed by the passing of the jet. We certainly did not see anything that would cause any damage to a significant percentage of that.
So far your 'concept' is nothing more than 'explosives used to create a hole in a column'. Your 'concept' is no more fleshed out or practicle than Ms. Wood's pet concept.
Oh it's real. Here are some good quality videos, made by a member on this site. http://www.youtube.com/watch?v=JzRljtPjOhM
Here you see the almost circular flash http://www.youtube.com/watch?v=Cw3dzA0sDTQ&feature=related
And another with the flash/flame out of the back http://www.youtube.com/watch?v=aPlt6Yghriw&feature=related
Here's what a flash should look like AFTER impact, and compare that to the second video above. http://www.youtube.com/watch?v=25vlt7swhCM
You see it best at about 25 seconds.
As far as damage goes, a slightly bigger missile more columns damaged.