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2001 Anthrax attacks timeline: Five die after letters mailed

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Here's a timeline of the 2001 Anthrax letters attack:

The New Jersey post office where authorities believe several of the Anthrax letters were mailed stayed closed for four years. (Photo: Associated Press)

Sept. 17-18, 2001: Five letters are sent to ABC, NBC, CBS, the New York Post and American Media, the publisher of the National Enquirer, from a Trenton, N.J. postmark.

Oct. 2, 2001: Two weeks after sniffing powder in a letter sent to the American Media building in Florida, The Sun photo editor Robert Stevens, who worked at in the building in Boca Raton, is hospitalized.

Oct. 4, 2001: Stevens is diagnosed with inhalational anthrax. He dies the next day. Three days later, tests run on his computer keyboard also test positive for anthrax.

Oct. 9, 2001: Authorities believe this is the date when two more letters were sent to Sens. Tom Daschle and Patrick Leahy.

Oct. 10, 2001: A third American Media employee tests positive for anthrax. The National Enquirer headquarters is shut down.

Oct. 12, 2001: A letter sent to NBC News, which tests positive for anthrax, is turned over to the FBI. It had already been opened.

Oct. 15, 2001: The letter sent to Sen. Daschle is opened. Two days later, 31 Capitol Hill staffers test positive for anthrax. Spores are detected in a Senate  mail room.

Oct. 21/22, 2001: Two postal employees at the Brentwood post office in D.C., Thomas L. Morris, Jr., 55, and Joseph P. Curseen, 47, die of anthrax exposure.

Oct. 25, 2001: A mail service worker at the State Department is hospitalized and tests positive for anthrax.

Oct. 29, 2001:A New York City hospital employee, 61-year-old Kathy Ngyuen, is diagnosed with inhalational anthrax. She dies two days later.

Nov. 7, 2001: President George W. Bush says the anthrax letters represent another terrorist attack on the United States.

Nov. 20, 2001: Ottile Lundgren, 94, of Connecticut is diagnosed with anthrax. She dies the next day.

April 18, 2002: Anthrax spores matching the profile of those sent in the letters are found outside a containment area at Fort Detrick are found, including inside the office of Dr. Bruce Ivins. Ivins had been testing spores at Fort Detrick since the attack occurred.

April 11, 2007: Ivins is placed under periodic surveillance and is declared a suspect in connection with the attacks.

July 2008: Ivins is informed that the FBI is planning to press charges against him for alleged involvement in the anthrax letters.

July 29, 2009:Ivins dies of a drug overdose.

August 8, 2009: The FBI declares that Ivins was the sole person behind the anthrax attacks.

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