We should not have to be asking this question. The USA should be able to go to bed peacefully without worry.
The reason why we have to be worried about going into a mall, taking a train, flying, getting into a bus, letting our kids go into a school, is that our elected representatives choose NOT to profile, in other words, do what is needed to protect us. While they mutter sweet nothings about peaceful people, thousands of the peaceful people are plotting to kill us.
Block the borders to people from countries that grow terrorists, and expel those who are already here.
No one I know is worried about Iran's wet dream. The midget will get what's coming soon.