There is a book called. "The Science of Fear." One really interesting part is that it claims we miscount the 9/11 disaster by just over 1500 lives. These are the increased traffic fatalities that year. Essentially, you could look at the 20 years before 9/11 and the 5 or more years after 9/11 and traffic fatalities follow a fairly predictable and stable curve when accounting for the increases in people on the road. With one exception. In the 12 months after 9/11 there is a huge spike that does not appear anywhere else in the curve. An extra 1500 people died because people were afraid to fly.
The above is a paraphrase of a much more elaborate and nuanced analysis, but for me it is pretty compelling.