The National Terrorism Advisory System (NTAS) is designed to guide our protective measures when specific information to a particular sector or geographic region is received. It combines threat information with vulnerability assessments and provides communications to public safety officials and the public.
- Homeland Security Threat Advisories contain actionable information about an incident involving, or a threat targeting, critical national networks or infrastructures or key assets.
- Homeland Security Information Bulletins communicate information of interest to the nation’s critical infrastructures that do not meet the timeliness, specificity or significance thresholds of warning messages.
- National Terrorism Advisory System Alerts is used to communicate with public safety officials, government agencies, airports and other transportation hubs, the private sector and the public at-large by providing timely, detailed information.