In late October 2001, Tomas Foral, a 26-year-old master's student working in a pathology laboratory at the University of Connecticut in Storrs, was asked by a professor to help clean out a failed basement freezer. Foral discovered that the freezer contained several vials of cow tissue infected with anthrax. What happened next is in dispute: university officials would later say the professor told Foral to destroy the vials, while Foral maintains that the professor's instructions were unclear. In any event, he saved two of the vials for future research by putting them in another laboratory freezer.

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