Via CrytpoPane, this link to inforwarrior.org where Richard Forno has suggested a standard Terror Warning:
Given this new reality – that America is no longer immune from terror acts waged against it from within its borders – citizens and authorized foreign visitors to the United States are advised that they can either spend their lives cowering in fear and hiding in their basements, or continue to move about America and live their lives as best as they can, understanding that America – despite all it offers – has changed slightly for the worse, whether they like it or not.
I would only disagree with the idea that something has actually changed. Nothing has changed except that the general public now realizes we are vulnerable. That is signifigant, but the fact is that we’ve always been vulnerable.