Sorry Carol, a bomb going off and planes crashing are different emotional factors - much like Pearl Harbor. That is the terror you are talking about and it is hard to conceive that anyone would take such a risk to lose it all when it could be done so simply. The "Rube Goldberg" theory that has been described to destroy these building would have required more people and more work than you are willing to admit to.

Many people disagree - the buildings did not have to fall to have the desired effect.

Again, it is your view against others. Maybe you are right, but you certainly have not been able to convince anyone yet.