Book excerpt: This paper, the Domestic Approach to National Intelligence, describes certain key roles and relationships that characterize efforts by members of the U.S. Intelligence Community (IC) and federal, state, local, tribal and territorial (FSLTT) government organizations to engage with one another to carry out the shared mission of protecting the homeland. These partners work with one another, and through established channels with the private sector (e.g., critical infrastructure owners and operators), as part of a complex web of relationships. Each partner, regardless of level, plays an important role in protecting the homeland with respect to warning, interdiction, prevention, mitigation, and response. The importance of partnerships and collaboration is emphasized in this paper, as is the IC's responsibility to the public to protect privacy, civil rights, and civil liberties. Descriptions related to organizational responsibilities and/or authorities are provided by the respective agencies. The Domestic Approach to National Intelligence is consistent with the framework and recommendations outlined in the Criminal Intelligence Coordinating Council's (CICC) National Criminal Intelligence Sharing Plan, the strategies in support of the National Network of Fusion Centers, and information sharing and safeguarding standards outlined by the Program Manager for the Information Sharing Environment (PM-ISE). By describing these roles and relationships in one place, this paper strives to foster an important national dialogue that will promote a better understanding of how the IC engages with key partners in this domestic enterprise and supports the holistic ideals articulated by the Director of National intelligence (DNI).