On September 11, 2001, foreign terrorists attacked the United States. Citizens of the United States were shocked, scared and grieving. It was a time of paranoia and distrust. People wondered when and if the country would be attacked again.

Then, a matter of days later, something happened that caused nearly everyone to believe that the U.S. was still under attack. A number of letters containing spores of the bacteria that causes anthrax were sent to public figures. People who had been exposed to these letters, or letters that had come into contact…