Lets see, a modern, fully fueled jet aircraft weighing nine times as much as B-25 and moving twice as fast would, in my mind, would result in a fair bit more damage to anything it collided with.
Beyond that, the ESB is based on a 3D grid design, with columns and beams throughout the structure. This leads to a very robust design, at the expense of open floor space. Contrast this with the WTC, which is a ‘tube’ design. The majority of the load bearing structure is on the outside of building, which unfortunately turns out to be a weak spot vs. jumbo jets piloted by suicidal terrorists.
If anyone is interested in the science behind exactly WTF happened I’ll suggest checking the Nova special on it.
