8The Partnership for Public Warning ( PPW). ANational Strategy for Integrated Public WarningPolicy and Capability. http://www. partnershipfor-publicwarning. org/ppw/docs/nationalstrategy. pdf.
10The Partnership for Public Warning ( PPW).Improving the Effectiveness of the Homeland Secu-rity Advisory System, http: //www. ppw. us/ppw/docs/hsas report, pdf.