Anthrax

By Susan Cornwell and Marilyn W. Thompson WASHINGTON, April 25 (Reuters) - The FBI said on Thursday that more tests may be necessary to determine the potency of a granular material identified as ricin that was packed into letters sent to President Obama,...

WASHINGTON, April 24 (Reuters) - Since deadly anthrax-laced letters were sent through the U.S. mail in 2001, killing five people and spreading nationwide panic, the FBI has beefed up its bioterror capabilities and created a Weapons of Mass Destruction...

Paul Kevin Curtis dreamed of conspiracy and was convinced that the government was spying on him -- which it had been, at least a little, since 2007, in the sense that officials occasionally investigated him on suspicions that his anti-government ramblings...

President Barack Obama was due to visit Boston on Thursday to attend a memorial service for victims of the Boston Marathon bombing amid a manhunt for a suspect seen on video taken before two blasts struck near the finish line on Monday. Obama will...

A terror bombing at the Boston Marathon, an explosion at a Texas fertilizer factory and tainted mail in Washington, D.C. have made for an unsettling week. Throw in anniversaries of some of America's most tragic and traumatic days -- Virginia Tech,...

CORINTH, Miss. (AP) — A Mississippi man accused of mailing letters with suspected ricin to national leaders believed he had uncovered a conspiracy to sell human body parts on the black market and claimed "various parties within the government"...

WASHINGTON – Investigators say there are no signs of a link between the Boston Marathon bombings and potentially poisonous letters sent to the President Obama and a U.S. senator. An FBI statement issued Wednesday said the investigation into the...

WASHINGTON (AP) — In a capital city on edge, letters sent to President Barack Obama and a Mississippi senator tested positive for poisonous ricin in preliminary checks, and authorities chased a stream of reports Wednesday of other suspicious-looking...

OXFORD, Miss. (AP) - The FBI has identified a Mississippi man suspected of mailing letters containing poisonous ricin as 45-year-old Paul Kevin Curtis. FBI Special Agent in Charge Daniel McMullen said Curtis was arrested Wednesday afternoon at his...

WASHINGTON -- Just two days after the Boston bombings, reports of letters possibly laced with poison and suspicious packages in government buildings set the nation’s capital on edge Wednesday and resurrected memories of the jittery weeks after the...

WASHINGTON (AP) — Police have a suspect in mind as they investigate a letter mailed to Sen. Roger Wicker that tested positive for poisonous ricin, a Senate colleague said. "The person that is a suspect writes a lot of letters to members," Sen....

WASHINGTON -- An envelope laced with the lethal poison Ricin and addressed to a U.S. senator was found at a Maryland mail processing facility, officials said Tuesday. The envelope, intended for the office of Sen. Roger Wicker (R-Miss.), was discovered...