My dumbass reply would be;

I don't think that they will ever hit us hard from the economic side of the house.

Our economy is too fluid to make this happen. Make us have tighter security at the airports, more security related jobs....more money for the average joe to spend.

SDI didn't kill us but it sure played havoc on the Soviets.

National debt.....when we sink, the world sinks.

Now hit us on our freedom, that's our critical vulnerability.