To bring things full circle, this morning I reminded my wife to keep her situational awareness up during her commute into NYC. No headphones on while in crowded places, etc. And we reviewed her plans for getting home to me and the kids if something bad should happen. She's much more prepared to handle adversity now, thanks to all I have learned on this forum. I hope she does not have to put the knowledge to use.
A lot of people are going to be on heightened alert. LEO, utilities, military personell, civilian defense workers, etc. I remember taking a course not long after 9/11 detailing how to minimize your potential as a target. I wonder if anybody is getting refresher on it.