Guys,
At that height, it would also make it a prime target for another attack

What I think needs to happen here is if they build them to that height, they need to turn maybe the top three floors to the military for use as a high-altitude manned Anti-Aircraft Battery. That way, if some ******* tries to do another 9/11 on the new towers, the plane can be shot down. Now, I know some people might have a problem with shooting down an airliner with 100 people aboard, but considering the consequences of what could happen if that airliner hit, I'd rather see 100 people die than 1000.
Josh