An arrest in the case of the ricin-laced letters that were mailed to various politicians, including President Barack Obama, in Washington, D.C., at the end of April appears to have quieted alarm about ...

Because of yet another mix-up with bioterror pathogens, a federal terrorism response training center in Alabama says it mistakenly exposed more than 9,600 ...

The FBI's Joint Terrorism Task Force has arrested a Kirkland man on charges of possessing ricin, which court documents call "the second-most-deadly toxin known to man." Robert M. Alberg, 37, is being ...