is lost or damaged. As an example, if there is a U.S. installation, Site A, located in a host nation. Site A is a tier 1 asset, meaning that if it fails, the Combatant Commands mission fails. Site A has mutual Global Information Grid Command Control (GIG/C2), information interdependencies with Sites B and C. In addition, other Defense Infrastructure sectors rely on Site A for mission capabilities. In this scenario, what could be the impact if the supply line to the commercial power plant that provides the installation's primary power is accidentally severed. Because of all the interdependencies, losing this asset is more than the loss of just one site. It means the loss of other sector capabilities. A possible mitigation action might be for Site A to go on backup power. An alternate action could be to pass complete control of Site A's functionality to another site, where redundancy has been previously arranged. These actions would limit the impact of this incident on the other sites and related sectors. In addition to lessening the operational impact of a critical infrastructure event, the Mitigation phase of the CIP life cycle supports and complements two other life cycle phases. Mitigation actions aid in the emergency, investigation, and management activities of Phase 5, Incident Response. They also facilitate the reconstitution activities of Phase 6. During the Mitigation phase, DoD critical asset owners, DoD installations, and Sector Chief Infrastructure Assurance Officers, or CIAOs, work with the National Military Command Center (NMCC) and the Joint Task Force-Computer Network Operations (JTF-CNO) to develop, train for, and exercise mitigation responses for various scenarios. When there is a warning, emergency, or infrastructure incident, the critical asset owners, installations, and Sector CIAOs initiate mitigation actions to sustain service to the DoD. They also provide mitigation status information to the NMCC and JTF-CNO. The NMCC monitors for consequences from an event within one Defense Infrastructure sector that are significant enough to affect other sectors. For events that cross two or more sectors, the NMCC advises on the prioritization and coordination of mitigation actions. When event threats or consequences continue to escalate, the NMCC directs mitigation actions by sector to ensure a coordinated response across the DoD. The NMCC and the JTF-CNO keep the National Infrastructure Protection Center, or NIPC, apprised of any significant mitigation activities. Phase 5: Incident response When an event affects the Defense Infrastructure, the Incident Response