“Sensitive Security Information (SSI) is information that would be detrimental to transportation security if publicly disclosed,” according to a Department of Homeland Security directive released last week under the Freedom of Information Act.
See DHS Management Directive 11056 (pdf), “Sensitive Security Information,” December 16, 2005.
Confusingly, however, SSI is also a control marking used by the Department of Agriculture to mean something quite different, observed information policy expert Harold C. Relyea of the Congressional Research Service in a new report (pdf) on classification and other information controls.
SSI “is both a concept and a control marking used by the Department of Agriculture (USDA), on the one hand, and jointly by the Transportation Security Administration (TSA) of the Department of Homeland Security as well as by the Department of Transportation, on the other hand, but with different underlying authorities, conceptualizations, and management regimes for it,” he wrote.
See “Security Classified and Controlled Information: History, Status, and Emerging Management Issues,” June 26, 2006.
While the number of different designations for “sensitive but unclassified” information has been estimated at over 60, that number approaches 100 if different agency definitions of the same designation are taken into account, according to a Justice Department official.
Successful NC3 modernization must do more than update hardware and software: it must integrate emerging technologies in ways that enhance resilience, ensure meaningful human control, and preserve strategic stability.
The FY2026 National Defense Authorization Act (NDAA) paints a picture of a Congress that is working to both protect and accelerate nuclear modernization programs while simultaneously lacking trust in the Pentagon and the Department of Energy to execute them.
For Impact Fellow John Whitmer, working in public service was natural. “I’ve always been around people who make a living by caring.”
While advanced Chinese language proficiency and cultural familiarity remain irreplaceable skills, they are neither necessary nor sufficient for successful open-source analysis on China’s nuclear forces.