Emergency preparedness

Chemical, Biological, Radiological,and Nuclear Response 

A CBRN incident is any occurrence resulting from the use of CBRN weapons and devices; the emergence of secondary hazards arising from counterforce targeting; or the release of toxic industrial materials (TIMs) into the environment, involving the emergence of CBRN hazards. A USG response would normally only be required when local, territorial, tribal, or state authorities are overwhelmed by the incident; if there are shortfalls in local, territorial, tribal, state, or federal response capabilities, other USG departments and agencies may require a defense support of civil authorities (DSCA) request for Department of Defense (DOD) assistance. For CBRN incidents occurring on foreign soil, either a host nation (HN) or international organization could request a USG response.