Protecting the American people from terrorist threats is our founding principle and our highest priority. The Department of Homeland Security's counterterrorism responsibilities focus on three goals:
- Prevent terrorist attacks;
- Prevent the unauthorized acquisition, importation, movement, or use of chemical, biological, radiological, and nuclear materials and capabilities within the United States; and
- Reduce the vulnerability of critical infrastructure and key resources, essential leadership, and major events to terrorist attacks and other hazards.