The U.S. was hit on its own territory, and furthermore, the impact was done by civilian aircraft, which most probably will create a psychological effect that is much bigger than the Gulf War,

The last thing we want to do is hit civilian targets, ... genocide.

What was dry is now wet. The river has more than reclaimed its territory.

While this is the largest monthly decline in nearly five years, the fall is entirely attributable to civilian aircraft, as non-defense aircraft orders returned to a normal pace, after a stunningly strong December.

At that point, the flight crew might still have been alive. Then, they've taken the aircraft to its destination, and they [the hijackers] kill the crew once the building is in sight.

Logistically, it does not make sense to move the (center) away from the aircraft and airspace that best facilitate its mission,