One group suggests deporting all arab nationals. That's great. You'll deport all the law-abiding ones and leave the others to blend in while enflaming the situation.
Having our cropdusters be watchful and carry a firearm is fine if we think they could overpower a large group intent on taking the plane anyway. I guess we're also assuming that Bob the cropduster eats, sleeps, and does his grocery shopping in the plane.
Additionally, cropdusters aren't the only way to do this. Any light aircraft will do, and it can be done less effectively in a thousand other ways by anyone sympathetic to their cause, regardless of their citizenship.
I don't think there's any defense once it's gotten to the point where a decision has been made to do it.
The only defense that makes sense to me is to strike those who we know intend to do this.
That means Iraq.
It also means striking bin Laden and all other terrorist groups by whatever means it takes.
If the vials of biological warfare are already in this country with orders to use them, then it will happen. You can't wear a gas mask 24 hours a day.
The sooner that our leadership arrives at this conclusion the safer I will feel. I can see the crop duster delivery method stirs the visceral emotions of FReepers everywhere but it is merely one way to get the job done. Dismantling the infrastructure of those who want to accomplish such deeds is the ONLY way to diminish the risk of such an act. Getting rid of the individuals who want to commit the attack is OK but they will have successors. GWB has articulated the correct approach and God give him, and the American people, the stamina and resolve to accomplish the mission.