Over at Cato Unbound, Reason contributor and political scientist John Mueller says to relax about terrorism:
Thus far at least, terrorism is a rather rare and, appropriately considered, not generally a terribly destructive phenomenon. But there is a danger that hysteria over it could become at least somewhat self-fulfilling should extensive further terrorism be visited upon the Home of the Brave.
Go here for his whole essay and the first of three responses.
I interviewed Mueller about terrorism and safety issues for the October issue of Reason. That Q&A is online here. Back in 2002, Mueller participated in a Reason debate about whether the U.S. should invade Iraq. Check that out here. And here's his excellent Reason essay about how P.T. Barnum invented business ethics.