JP 3-28, page 158

GL-6 JP 3-28 PART II—TERMS AND DEFINITIONS base support installation. A Department of Defense Service or agency installation within the United States and its territories tasked to serve as a base for military forces engaged in either homeland defense or conducting defense support of civil authorities. Also called BSI. (Approved for incorporation into the DOD Dictionary.) catastrophic event. Any natural or man-made incident, including terrorism, which results in extraordinary levels of mass casualties, damage, or disruption severely affecting the population, infrastructure, environment, economy, national morale, and/or government functions. (DOD Dictionary. Source: JP 3-28) civil authorities. Those elected and appointed officers and employees who constitute the government of the United States, the governments of the 50 states, the District of Columbia, the Commonwealth of Puerto Rico, the United States Virgin Islands, Guam, insular areas, and political subdivisions thereof. (Approved for incorporation into the DOD Dictionary.) civil emergency. Any occasion or instance for which, in the determination of the President, federal assistance is needed to supplement state and local efforts and capabilities to save lives and to protect property and public health and safety or to lessen or avert the threat of a catastrophe in any part of the United States. (Approved for incorporation into the DOD Dictionary.) complex catastrophe. Any natural or man-made incident, including cyberspace attack, power grid failure, and terrorism, which results in cascading failures of multiple, interdependent, critical, life-sustaining infrastructure sectors and causes extraordinary levels of mass casualties, damage, or disruption severely affecting the population, environment, economy, public health, national morale, response efforts, and/or government functions. (Approved for incorporation into the DOD Dictionary with JP 3-28 as the source JP.) coordinating agency. An agency that supports the incident management mission by providing the leadership, staff, expertise, and authorities to implement critical and specific aspects of the response. (DOD Dictionary. Source: JP 3-28) crisis management. Measures, normally executed under federal law, to identify, acquire, and plan the use of resources needed to anticipate, prevent, and/or resolve a threat or an act of terrorism. (Approved for incorporation into the DOD Dictionary.) critical infrastructure protection. Actions taken to prevent, remediate, or mitigate the man-made or natural risks to critical infrastructure and key assets. Also called CIP. (Approved for incorporation into the DOD Dictionary.) defense coordinating element. Staff and military liaison officers who assist the defense coordinating officer in facilitating coordination and support to activated emergency support functions. Also called DCE. (Approved for incorporation into the DOD Dictionary.)