The term 'Homeland Security Org.' refers to three organizations that are part of the United States Department of Homeland Security. The first is the Federal Emergency Management Agency (FEMA), which is responsible for responding to disasters and providing relief to affected areas. The second is the United States Coast Guard (USCG), which is responsible for maritime safety, security, and environmental protection. The third is the Emergency Management Office (EMO), which is responsible for coordinating emergency response efforts across all levels of government. Together, these three organizations work to protect the United States from threats both domestic and foreign.