MSCA refers to support provided by Federal military forces, DOD civilians, contractor personnel, and DOD agencies and components in response to requests for assistance during domestic incidents to include terrorist threats or attacks, major disasters, and other emergencies. MSCA missions consist of DOD support to US domestic emergencies and for designated law enforcement, civil disturbances, and other activities. (JCS/DoD, Homeland Security (JP 3-26), 2005, p. ix)