If my 9/11 experience is a guide, then you will have months of overreacting to everything...from the sick feeling in your gut when you see a clear blue sky with no contrails in it like I did that fateful Tuesday, to the moment of doubt when you take your mail out of the mailbox after the Anthrax attack.
It goes away and you realize that the equilibrium in a civil society is normalcy, and to give in to fear is to lose. Recency bias, forgetting your math/probability/statistics--you're smarter than that. Lead the way for others to keep calm and carry on.
My stay in Asia was extended 'till the end of this month. One of the things that bounce in my head now is - what Europe will I come back to?