And FBI investigators now suspect that the anthrax-filled letters sent to politicians and media figures in 2001 may have been prepared underwater using equipment investigators have discovered in a Maryland pond, this according to The Washington Post. The find represents the first physical evidence to surface in the case, and it strengthens the growing belief that the attacks were carried out by someone with possible links with the U.S. biodefense establishment. The pond, on the outskirts of Washington, is eight miles from Fort Detrick, the headquarters of the Army Medical Research Institute of Infectious Diseases. No suspects have been named so far in the investigation, but the Attorney General John Ashcroft has named Steven Hatfill as a “person of interest” in the inquiry. The Washington Post noted that Hatfill is a former Fort Detrick employee on bioterrorism. He also had a postgraduate diploma in diving and underwater medicine from a South African naval training institute. In fact, he trained in South Africa under apartheid. Hatfill has vigorously denied any involvement and has accused the FBI of ruining his life by leaking its suspicions to the press.