Anthrax hoaxes were sporadically reported in the 1990s,[REF] including a petri dish in an envelope labeled "anthrachs"[sic] sent to B'nai B'rith in Washington in 1997 that contained harmless Bacillus cereus,[REF][REF][REF] but a spate of anthrax threats followed the 1998 arrest of Larry Wayne Harris, a microbiologist and white supremacist.
In the month following the 2001 anthrax attacks, hundreds of hoaxes were reported worldwide [REF].