Yet none of the buildings you quote were 110 stories tall. None of them were constructed in such a unique manner as to withstand the dramatic stresses these towers would . None of them had a 767 park inside them. And in the process take out multiple floors of structural support. And none of them had thousands of gallons of fuel ignite fires on multiple floors. In the case of #7, are you familiar with the unique structural components of the tower? Obviously not.