On 9/11 I was stunned and mad.
On 9/12 I was even madder.
On 9/13 I kept thinking about how to get the terrorists and very little on my driving.
I was lucky on not having a wreck but I was not paying as much attention to traffic.
I think in Israel its more about people thinking they could be a target during the day, and not about how to get the terrorists (as enough thinking about that has already occured). Or people feeling depressed they continued to be murdered.