What is the main focus of standards such as DCID 6/9?

The primary focus of standards like DCID 6/9 is indeed on the construction of secure facilities. DCID 6/9 outlines the requirements for the physical security of sensitive compartmented information facilities (SCIFs) and emphasizes how these facilities should be designed and constructed to protect classified information from unauthorized access and compromise. It provides guidelines on various elements such as site selection, physical barriers, access controls, and security measures to ensure that sensitive information is safeguarded effectively.

Standards like DCID 6/9 are crucial in the context of national security because they establish a baseline for physical security measures that military and intelligence communities must adhere to for protecting classified information. This focus is distinct from other options, which do not address the specific needs and requirements for safeguarding secure facilities used for classified activities.