Yes, they did have many months.
You seem to thing that someone can place a set of explosives inside a steel-structured building in a few hours and it will collapse. That is not how it is done in the real world. I was watched the Discovery Channel on demolitions and one of the demolitions that was presented was the two bridge towers in Corpus Christi, TX, which is where I was living for the past few years. It took months of prepare the two towers for demolition and the program made it very clear as to why pre-weakening of a steel structure was required. The demolition experts would have faced a $100,000.00 a day fine if the towers fell into the channel and that fine would have been in effect each day the channel was blocked.
The demolition experts experimented with steel beam test subjects and it was made very clear why pre-weakening was required and one reason is, a steel structure will not collapse as planned manner if the structure is not pre-weakened. Just to plan, pre-weaken, and place the explosives on the two steel bridge towers took many weeks of preparation.
Recently, I posted a video where 1000 pounds of thermite was unable to cut a vehicle in two. In the Discovery Channel segment, a test was conducted using demolition explosives and a vehicle, but in this case, the vehicle was pre-weakened and as a result, a few pounds of demolition explosives cut the vehicle in sections cleanly in two sections.
And, it is clear why thermite was not used to bring down the bridge towers and in fact, the workers had to use tortures to pre-weaken the steel beams. In regards to the 9/11 attacks;
* No evidence of explosions in the videos
* No sound of bomb explosions heard.
* No bomb explosions detected on sensors
* No evidence of explosives found in the rubbles of the WTC buildings
= no explosives used.
Edited by skyeagle409, 06 May 2012 - 04:31 PM.