Which agency primarily focuses on defense intelligence?

The Defense Investigative Agency is specifically tasked with providing investigative and security support services primarily for the Department of Defense. This includes conducting background checks, managing personnel security, and overseeing various intelligence-related activities aimed at ensuring the security of defense operations.

While the Department of Defense encompasses a broader range of responsibilities and includes various branches and agencies that may be involved in intelligence gathering and analysis, the Defense Investigative Agency is more directly focused on defense intelligence activities, particularly concerning the vetting of personnel and maintaining security protocols.

In contrast, the Department of Justice deals mainly with law enforcement and legal matters, focusing on the criminal justice system rather than intelligence. The Department of State is primarily responsible for international relations and diplomacy, which includes some intelligence but is not its main focus. Therefore, the Defense Investigative Agency is the most appropriate answer when specifically referencing an agency concentrating on defense intelligence.