Chapter I - Overview: (1) General: (B) CBRN Incident, USG Approach to a: The USG approach to managing the consequences of a CBRN incident is vested in chemical, biological, radiological, and nuclear consequence management (CBRN CM). CBRN CM can be described as the overarching USG capability and the strategic national direction, to prepare for, respond to, and recover from the effects of a CBRN incident at home or abroad, and whether or not it is attributed to an attack using weapons of mass destruction (WMD). When required, the USG will coordinate its response to a CBRN incident in one of three ways based on the geopolitical situation. The Department of Homeland Security (DHS) is the USG lead agency for incident management that would include a domestic CBRN incident. Overseas, excluding homeland areas, the Department of State (DOS) is the USG lead for what is termed foreign consequence management (FCM). In either of those situations, and when directed, Department of Defense (DOD) typically supports the USG lead. A third scenario could require DOD to lead the USG effort during military operations when the host nation (HN) is unable to respond properly, or DOS is unable to lead the USG response. Also, a USG response is not necessarily triggered by recognition of a CBRN hazard or environment. (1) CBRN Hazards: CBRN hazards are CBRN materials that, if released, could create an adverse effect within the environment. If the size and scope of a CBRN hazard and/or environment exceeds established parameters, civil authorities may declare an emergency and the situation may be deemed a CBRN incident. However, only when local, tribal, or state authorities are overwhelmed by the situation would a USG response normally be required. Subsequently, if there are shortfalls in federal and state CBRN capabilities, the USG approach would likely require a request for DOD assistance in the form of CBRN CM. (2) CBRN Incidents: A CBRN incident is any occurrence resulting from the use of CBRN weapons or devices, or the release of CBRN hazards, to include toxic industrial materials (TIMs) from any source. This may include the emergence of CBRN hazards arising from counterforce targeting during military operations. Domestically, an incident may result in the President declaring an emergency or a major disaster. For CBRN incidents occurring on foreign soil, either an HN or intergovernmental organization (IGO) could request a USG response, or if it is likely to create a deleterious domestic effect, such as the spread of infectious disease or radioactivity across borders into the US, that may require the President to declare an emergency under the National Emergencies Act. Outside of certain response requirements discussed in DOD issuances, an order from the President/Secretary of Defense (SecDef) is typically required for DOD CBRN response. (3) CBRN CM: CBRN CM considers the capabilities and limitations of the affected civil authorities, from the local first responders, up through the state response, to the federal (national) level. When the civil authorities up to and including the federal level lack necessary capabilities to mitigate the situation, or they anticipate being overwhelmed, military support typically is requested. For all domestic incidents (including a CBRN incident), the National Response Framework (NRF) and the National Disaster Recovery Framework provide national guidance for incident management and acknowledges the DOD as a full partner in the federal response when tasked. DOD and Chairman of the Joint Chiefs of Staff (CJCS) issuances frame US military support of a USG response for foreign and domestic CBRN incidents. (4) CBRN Response: DOD installation commanders develop CBRN responses for the installation as part of their installation emergency action plan in accordance with (IAW) Department of Defense Instruction (DODI) 2000.18, Department of Defense Installation Chemical, Biological, Radiological, Nuclear, and High-Yield Explosive Emergency Response Guidelines, and DODI 6055.17, DOD Installation Emergency Management (IEM) Program. Note: CBRN response is captured in the NRF and in Presidential Policy Directive (PPD)-8, National Preparedness. Domestically, DOD conducts CBRN response in support of the broader USG activities to prepare for, respond to, and provide a foundation to recover from CBRN effects as a result of natural or man-made disasters. The term FCM still applies to foreign support through DOS to an HN and is a valid term when used accordingly