A new report by the UPMC Center for Biosecurity suggests that the US remains unprepared for the task of decontaminating the site of a major biological weapon attack. Decontamination after the comparatively small-scale Anthrax attacks of 2001 is estimated to have cost hundreds of millions of dollars, while shuttering some facilities for as long as two years. By comparison, the costs of a larger scale attack on a major city could be staggering.