Evidenced by what actions?? The vast majority of us still get on planes. I think there's more anger than fear at the way our lives were forced to change. The human spirit is amazingly resilient, and I happen to believe that Americans are exceptional in their desire to stand strong against the face of adversary.
Not all Americans will still get on planes. But it's more than that, perhaps "attitudes" is a better word than "actions". It's in the causes they - we - choose to support, the nature of the arguments over all issues remotely related to terrorism, the rise of nationalistic fervor and collective paranoia. Did you or anyone else notice the arguments on issues ranging from the NYC mosque to koran burning to the wars and on and on quickly devolve into blamefests and accusations while they rather decidedly avoid any concrete discussion of security - or insecurity, as the case may be? I'd say a lot of Americans are still coping, still adjusting, still evolving and in many ways still struggling with denial over their feelings of insecurity and how best to address them. Which I don't have a problem with per se, but let's then at least be honest about it.
I just don't see fear as the motivating factor in any of those examples. You can argue that fear is an underlying issue for some, and in select circumstances, but it is not what consumes us as a people.
I'd say it's an underlying issue to some degree for a lot of folks, and for more reasons than 9/11 but that was what started the ball rolling with the collective insecurity. Random death and destruction from the sky.....that's certainly a traumatizing event and thought, isn't it? Like I said, I'm not going to make any judgments about individuals, but the signs of a widespread problem are there in the arguments on this board and in the national discourse - or what passes for it. We're sort of stuck in a loop.