[Critter]

Would 9-11 have happened if even 4-5 passangers on each airplane been armed?

That is hard to say. The terrorists mighta had guns too, in that case. But, I would rather take my chances armed rather than disarmed. Better to have a slim chance than no chance. :)

[Dead Corpse]

Better to have a slim chance than no chance. :)

I couldn't have said it better myself.

Such regulation on carry aboard aircraft should be left to the airline company. Let the free-market shake things out from there.