It is not as bad as you think. Israel has a growing economy yet they have a car bomb a week in a nation that is about the size of a texan backyard. After an adjustment period, you learn to live with about anything.
I think this very true. There are 280 million Americans. This country is huge. And we live with danger everyday. Heck, California could be hit by massive earthquakes tomorrow and people live there and accept it.
I think everday when I wake up, will something happen? Will they attack? But it does not scare me to think about it. I'm not at all afraid. You get used to it. During the Cold War we lived with the idea that we could be nuked. It's the NOVELTY of terrorists actually attacking us on our own soil in such a spectacular way that now causes us to focus like a laser on terrorist generated danger as opposed to other kinds of danger.