The alert wasnt meant for citizens, it was meant for law enforcement. If you dont know how to be vigilent where you are, then ask a ten year old.
As for no credible threat, what do you want? Names of parties that plan to blow up AA flight# xxxx at LaGuardia on Christmas Eve. If they had that imformation and could act on it, they already would have. Grow up. Learn to live with ambiguity or crawl under your bed and cry, little baby.
Great. So the same donut munchers manning the speed traps, failing to solve even 10% of burglaries, and burning down churches are supposed to heed this alert and be effective at preventing something?
Was is Chief Moose that got it right, or informed Freepers? I'd rather put my trust in my fellow Freepers.