Right but you're assuming killing the maximum amount of people as possible was their goal. While it is true that the modern religious terrorists are much more apt to killing mass amounts of people, indeed while it is even their goal at times, to dismiss the idea of demolitions by simply assuming that they were trying to kill as many Americans as possible ignores the realities of the actual attacks that I pointed out. Furthermore, they still killed over 3,000 people and it was still by far the deadliest terrorist attack in history. They are clearly very smart - if their goal was to kill as many Americans as possible on that day I believe their targets perhaps even their mode of attack would have been much different.