The Senate letters contained an unusually fine, nearly pure powder, and early microscopic examinations led government scientists and officials to fear that the spores had been engineered into a sophisticated military-style weapon. In October 2001, USAMRIID scientist Peter Jahrling reported seeing what appeared to be an additive, and subsequent reports described silicon dioxide, or finely powdered glass, supposedly attached to the spores to make them more dangerous when inhaled. The possibility of an advanced bioweapon immediately intensified speculation about Iraq, al-Qaeda, or a state-sponsored attack. Newspapers including The New York Times and The Washington Post published accounts describing the material as high-grade or chemically enhanced, while scientists debated whether the powder represented a major technological advance. The story gradually unraveled. Bioweapons specialists Kenneth Alibek and Matthew Meselson examined electron micrographs and reported no evidence of fumed-silica coating; Sandia National Laboratories testing in early 2002 found that the powders were not weaponized; and Jahrling later acknowledged that he had made an honest mistake after being overly impressed by what he thought he saw under the microscope. FBI scientist Douglas Beecher subsequently argued that the powders were simply anthrax spores purified to different degrees. The attacks were still extraordinarily lethal, but the dramatic image of a secret, state-level coating technology became one of Amerithrax's most persistent and misleading legends.
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AI concept artworkArchive Record · 2000s
The Anthrax 'Weaponization' Panic That Was Later Walked Back
Amerithrax Anthrax Powder / 2000s
The Senate letters contained an unusually fine, nearly pure powder, and early microscopic examinations led government scientists and officials to fear that the spores had been engineered into a sophisticated military-style weapon. In October 2001, USAMRIID scientist Peter Jahrling reported seeing what appeared to be an additive, and subsequent reports described silicon dioxide, or finely powdered glass, supposedly attached to the spores to make them more dangerous when inhaled. The possibility of an advanced bioweapon immediately intensified speculation about Iraq, al-Qaeda, or a state-sponsored attack. Newspapers including The New York Times and The Washington Post published accounts describing the material as high-grade or chemically enhanced, while scientists debated whether the powder represented a major technological advance. The story gradually unraveled. Bioweapons specialists Kenneth Alibek and Matthew Meselson examined electron micrographs and reported no evidence of fumed-silica coating; Sandia National Laboratories testing in early 2002 found that the powders were not weaponized; and Jahrling later acknowledged that he had made an honest mistake after being overly impressed by what he thought he saw under the microscope. FBI scientist Douglas Beecher subsequently argued that the powders were simply anthrax spores purified to different degrees. The attacks were still extraordinarily lethal, but the dramatic image of a secret, state-level coating technology became one of Amerithrax's most persistent and misleading legends.
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