Presidential Directive
Homeland Security Presidential Directive 18 (HSPD-18)
Signed: January 31, 2007
“It is the policy of the United States to draw upon the considerable potential of the scientific community in the public and private sectors to address our medical countermeasure requirements relating to CBRN threats. Our Nation will use a two‑tiered approach for development and acquisition of medical countermeasures, which will balance the immediate need to provide a capability to mitigate the most catastrophic of the current CBRN threats with long-term requirements to develop more flexible, broader spectrum countermeasures to address future threats. Our approach also will support regulatory decisions and will permit us to address the broadest range of current and future CBRN threats.”