The FBI thinks they’ve got a handle on the anthrax attacks until people start dying in ways that don’t make sense. What follows is a years-long investigation full of obsession, surveillance, false accusations, ruined lives… and a final suspect with secrets darker than anyone imagined.

Sources

Amerithrax or Anthrax Investigation

Amerithrax Investigative Summary

Anthrax Bioterrorism: Lessons Learned and Future Directions - PMC

2001 anthrax attacks 

Death of Robert Stevens 

Hijacker Visited Crop-Duster Airfield - ABC News

Paul Keim

American Airlines Flight 11

Ames strain 

Paul Keim: "We Were Surprised It Was the Ames Strain" | FRONTLINE

Terror plot feared in anthrax outbreak | World news | The Guardian.

Anthrax attacks 2001: Poison panic after contaminated letters sent to Daschle, Brokaw, postal workers.

New York Hospital Worker Dies of Inhalation Anthrax | PBS News

The investigation of Dr. Shaikh - POLITICO

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