Robertson is a liar then because the port authority considered 600 mph, which is the sensible thing to do seeing as it is the planes top speed.
No it's not sensible because it's expensive
Imagine the scenario:
We're going to build two of the tallest structures in a city
We have to take into account the possibility of siesmic activity, extreme weather conditions etc etc
Now, what else should we consider?
Well, there's always the possibility of a plane hitting the structure.
JESUS! What the hell are we going to do about that?
Well, first we can calm down and consider just WHY a plane might hit the structure.
OK this is sounding a bit better....so let's consider.
Well, the plane is obviously having difficulty....
....no kidding!...
....and if it can't avoid a tall building it could be because it can't control it's direction or....
...or....
....or it can't se the building.
OK.... so what does a plane do in those circumstances?
Well, the common procedure would be to dump fuel, anticipating a difficult landing somewhere, and slow down to give the pilots a chance to react to any given circumstance.
..ok good so we consider a plane that has dumped fuel and slowed right down beofre hitting our tower....
...yes we do....
...ok then.....
...ok....
...ok....
... ok thank you...
...ok thank
you....
..ok...you're kinda cute, you know?...
...yeah...i know.....
