Freedom to get on a plane with people who refuse to identify themselves? You can have it. In case you hadn't noticed, all the people who were involved in the September 11th atrocity were very easily identifiable.
The WTC attack did not occur because Americans have too much freedom.
It occurred because:
- U.S. border/immigration policy (or selective enforcement thereof) allowed obvious terror suspects to enter and remain in the country while attending flight school.
- The terrorists were able to gain access to the cockpits of the hijacked aircraft.
Evidently people like you believe that America should now become a prison in lock-down mode. I hope you get your wish, you little coward.
You forgot: Because citizens are disarmed on aircraft and are unable to defend themselves and their loved ones.