Overview
The attacks followed a week after the September 11 attacks which had caused the destruction of the World Trade Center in New York City, damage to The Pentagon in Arlington, Virginia and the crash of an airliner in Shanksville, Pennsylvania. The anthrax attacks came in two waves. The first set of anthrax letters had a Trenton, New Jersey postmark dated September 18, 2001. Five letters are believed to have been mailed at this time to: ABC News, CBS News, NBC News and the New York Post, all located in New York City and to the National Enquirer at American Media, Inc. (AMI) in Boca Raton, Florida. Robert Stevens, the first person who died from the mailings, worked at a tabloid called Sun, also published by AMI, died on October 6, 2001, four days after entering a Florida hospital with an undiagnosed illness that caused him to vomit and be short of breath. Only the New York Post and NBC News letters were found; the existence of the other three letters is inferred because individuals at ABC, CBS and AMI became infected with anthrax. Scientists examining the anthrax from the New York Post letter said it appeared as a coarse brown granular material looking like Purina Dog Chow.
Two more anthrax letters, bearing the same Trenton postmark, were dated October 9, three weeks after the first mailing. The letters were addressed to two Democratic Senators, Tom Daschle of South Dakota and Patrick Leahy of Vermont. At the time, Daschle was the Senate Majority leader and Leahy was head of the Senate Judiciary Committee. The Daschle letter was opened by an aide, Grant Leslie, on October 15, and the government mail service was shut down. The unopened Leahy letter was discovered in an impounded mail bag on November 16. The Leahy letter had been misdirected to the State Department mail annex in Sterling, Virginia, due to a misread ZIP code; a postal worker there, David Hose, contracted inhalational anthrax.
More potent than the first anthrax letters, the material in the Senate letters was a highly refined dry powder consisting of about one gram of nearly pure spores. USAMRIID scientists' lack of familiarity with powdered anthrax resulted in initial reports that the powders had been "weaponized" with silica. Bioweapons experts who later viewed images of the attack anthrax saw no indication of "weaponization". Tests by Sandia National Laboratories in early 2002 confirmed that the attack powders were not weaponized.
At least 22 people developed anthrax infections, with 11 of the especially life-threatening inhalational variety. Five died of inhalational anthrax: Stevens; two employees of the Brentwood mail facility in Washington, D.C., Thomas Morris Jr. and Joseph Curseen; and two whose source of exposure to the bacteria is still unknown: Kathy Nguyen, a Vietnamese immigrant resident in the borough of the Bronx who worked in New York City, and Ottilie Lundgren, a 94-year old widow of a prominent judge from Oxford, Connecticut, who was the last known victim.
Because it took so long to identify a culprit, the 2001 anthrax attacks have been compared to the Unabomber attacks which took place from 1978 to 1995.
Read more about this topic: 2001 Anthrax Attacks