karen greenberg, just this week, we see that schools in los angeles close, schools in new york state open, walk us through the psychology of fear and what america needs to do moving forward as mike said, as the president said, this is not a threat to the united states. the flag is not doing to come down over the white house, and the capitol will not be othertaken and we won't have an occupying force, so this is not a threat to the sovereignty of the united states, just makes people afraid. >> right, but the question is, does it change our lifestyle. remember, after 9/11, george bush, said famously, please don't change the way you live. go out, go shopping. go to the movies, do something to show that you spill have your way of life. and so the deeper issue is how is this changing travel plans, how is this changing going to public arenas so that's what you want to be careful about. on the issue of the school closings this is not the first time schools in the united states have had bomb threats they had bomb threats at my school when i was a child during the cold war. >> the question is