On 12 March, a staff member at a high school in Hamburg, New York, found a note on the floor of one of the classrooms stating that anthrax would be released by the end of classes that day.
Summary: On 15 January, the United States Attorney's office in Buffalo, New York, received a letter containing a threat of anthrax exposure.
On 16 April, a note bearing an anthrax threat was handed to a faculty member of a high school in Chautauqua County, New York.
On 22 May, a college located in Syracuse, New York, received a letter containing an anthrax threat.
On 22 May, a high school located in Syracuse, New York, received a letter containing an anthrax threat.
Why was this not given a BEACON as JOB #1?
United States Postal Service: Answer ID 258Historically, how often do Anthrax and other threats and hoaxes occur?
During FY 1999 and FY 2000, there were approximately 178 anthrax threats received at courthouses, reproductive health service providers (clinics offering abortion services or counseling), churches, schools, and post offices. During FY 2001 we have had only approximately 60 threats or hoaxes, which included anthrax, hoof and mouth disease, the Klingerman virus hoax and others.
Chemical and biological weapons are sometimes referred to as the "poor man's nuclear weapons" and pose a significant threat in the post-Cold War environment. Their relative low cost and simplicity of design and technology make them weapons of choice for a variety of rogue states and terrorist and non-state organizations. Although acts of chemical and biological terrorism have not been prevalent in the U.S. up to now, use of these weapons or the threat of their use are disruptive forces.
This answer is undated and so I do not know if it followed 9/11 or not.