For several weeks in the Fall of 2001, America was gripped by twin terrorist plots. The September 11 hijackings were a massive world event whose effects continue to ripple throughout most corners of the Earth; in the weeks after the Twin Towers fell, though, there was nearly as much fear and anxiety about a small stream of letters that were intentionally laced with anthrax. The killer was never officially identified, and the case was never formally closed, but one man has been intrinsically lin