JACKSON, Miss. - Even as the FBI and state officials searched Monday for a crop duster pilot who sprayed two boats on the Mississippi River last week, experts downplayed suggestions of bioterrorism. The incident could be one of dozens of accidental sprayings reported every year in the cotton-rich Delta, they said. State epidemiologist Dr. Mary Courier said preliminary tests found no evidence of anthrax, and a six-man crew on the barge tow sprayed by a crop duster on Friday had been told to stop taking antibiotics. The tow, which had been quarantined near Rosedale, was allowed to continue. Officials hope ...