"But in a few months, maybe people will be focusing on the fact there has been no terrorism attack, and that will improve consumer confidence."

The lack of growth was largely blamed on the September 11, 2001 terrorism attacks which slowed air travel nationwide.

It suggests that the 9/11 terrorism attack was a divine warning to the United States.

The larger grant would have helped significantly, he said, because business remained "down an average of 50 percent" two years after the terrorism attack.

The concern now is that there is this added uncertainty from the economic impact of the terrorism attacks.

Now, he said, opportunists are taking macabre advantage of the cover provided by the terrorism attacks.

We worry about any terrorism attacks here in the United States.

We also were able to look at terrorism attacks by these groups over time, using a methodology very familiar to criminologists, called trajectory analysis.

Clarke has now turned his attention to another potential security catastrophe: computer-based terrorism attacks.

Like Orlando's, the region's tourism business fell off after the 2001 terrorism attacks and was slow to recover.