Two days after the attacks of 9/11, I was working in downtown San Francisco. The alarm went off and everyone evacuated the building. Throughout the day, different buildings were evacuated throughout the city. It was found that all this occurred because of one bomb threat that was phoned in.
The city was going through psychological trauma. What I found interesting was that it occurred two days after the event. The feelings of vulnerability did not emerge until long after the event had been internalized. This sheds some light on the nature of psychological disturbances. They are sometimes delayed or manifested later.
Creswell tried to do the study to help schools deal with incidents like this that might occur in the future. As the author found out, people who seemed initially fine, felt very disturbed by what they experienced later. There was a delayed reaction to the events.
It was valuable that the author examined the situation over time as things are perceived through different lenses after time passes. This is valuable research because unfortunately this is an all too frequent event in North America.