10/4 Anthrax Attack Less than four months after the Dark Winter simulation and three weeks after 9/11, a mysterious spate of letters containing fine white anthrax spores arrived by mail at several news media outlets and the Capitol Hill offices of two senators, Tom Daschle and Patrick Leahy. Those two senators had been the most vocal in condemning the post-9/11 infringements on civil liberties pushed by the PNAC crowd.