A U.S. official today said there was a "very good likelihood" that traces of anthrax found in mail sent to an outside Federal Reserve facility could prove to be false positives or cross ...

Context: Incidents involving anthrax (Bacillus anthracis) through the mail in 4 metropolitan areas have raised concerns about the public's response nationally and locally. Objective: To examine ...

The letter sickened several postal workers who processed it, bringing Congress and government mail delivery to a standstill. Soon, another anthrax-laden letter addressed to Senator Patrick Leahy was ...