Threats to the national security

1. International terrorism;

2. Espionage and other intelligence activities, sabotage, and assassination, conducted by, for, or on behalf of foreign powers, organizations, or persons;

3. Foreign computer intrusion; and

4. Other matters determined by the Attorney General consistent with Executive Order 12333 or a successor order. (AG Guidelines for Domestic FBI Operations, 29 Sep 2008).

Source: Terms & Definitions of Interest for DoD Counterintelligence Professionals, Office of the National Counterintelligence, https://www.dni.gov/files/NCSC/documents/ci/CI_Glossary.pdf