1. GAO (2017) Testimony before the subcommittee on emergency preparedness, response, and communications, Committee on Homeland Security, House of Representatives. DHS’s Chemical, biological, radiological, and nuclear program consolidation efforts
2. Blair D (2010) Annual threat assessment of the US intelligence community for the Senate Select Committee on intelligence. Senate Select Committee on Intelligence, Washington, DC
3. United States Senate (2008) Hearing before the committee on homeland security and governmental affairs. United States Senate, Washington, DC
4. United Nations (UN) (2017) Ensuring effective interagency interoperability and coordinated communication in case of chemical and/or biological attacks. New York
5. Department of Homeland Security (2010) Quadrennial Homeland Security Review Report. Washington, DC