Quote:
Originally Posted by Chanda  In the opinion of Dutch demolition expert, Danny Jowenko: YouTube - 9/11: Dutch demolition expert Danny Jowenko on WTC #7 |
First, Heller's comments and mine were in reference to buildings 1 and 2. Second, Jowenko also says that 1 and 2 were NOT controlled demolitions. So either Jowenko is wrong about 1 and 2 and they were all controlled demolition, he's wrong about 7 and none of them were or he's right on all of them (unlikely).
But on WTC 7:
The final collapse of the building took over 8 seconds. The entire collapse sequence took between 13 and 16 seconds, more than twice the 6 second free fall speed.
Where are the blast points? If this was a controlled demolition then the blast points would be clearly visible.
Finally see Ramon Gilsanz and William Ng's article in
Structure Magazine on how the failure of one column could have cause WTC 7 to collapse.