What is the primary responsibility of the Under Secretary of Defense for Intelligence (USD(I))?

The primary responsibility of the Under Secretary of Defense for Intelligence (USD(I)) is to oversee the development and maintenance of security policies across the Department of Defense. This role entails ensuring that security policies align with national security objectives and regulatory frameworks, thus safeguarding classified information and sensitive operations. The USD(I) plays a crucial part in shaping the overall intelligence strategy, which includes formulating standards and protocols that govern not just intelligence activities but also broader aspects of defense security.

By focusing on security policies, the USD(I) enables effective risk management, establishes guidelines for intelligence gathering, and supports the integration of intelligence operations within the Defense Department. This emphasis on comprehensive policy development is vital for maintaining operational efficiency and accountability regarding the protection of U.S. interests.

Other aspects mentioned, such as conducting security oversight functions, verifying physical security measures, and training special access program officials, are supportive roles that, while important, are more specific tasks or functions that fall under broader security policy and management frameworks established by the USD(I).