“Definition: to support, supply, and maintain the necessary level and duration of activity to achieve a given objective. “Extended Definition: to maintain operations in the event of an attack, natural disaster, or other type of incident of national significance, either malicious or unintentional; and to provide, on a continual basis, the resources (people, funding, etc.) necessary to build, maintain and employ emergency response capabilities, as well as maintaining civil rights and liberties. “Annotation: To physically maintain the integrity and operational capacity of the nation’s critical systems, infrastructures, and their ability to function properly under any circumstances particularly during a period of recovery associated with and immediately following an adverse event or series of events caused by attack or natural disaster. Maintain effective support at critical or alternate locations in spite of natural or man-made disasters. “Example: DHS will be a driving force to sustain and/or restore critical infrastructure”. (DHS, Lexicon: Terms and Definitions, October 19, 2007, p. 25)