- Department of Homeland Security (DHS)
- Official Department of Homeland Security site, featuring news, research and technology, current terror alerts and threats, links to sub-agencies, and more. - Bureau of U.S. Citizenship and Immigration Service (8)
- Executive Order Establishing the Office on Homeland Security
 - Homeland Security Act of 2002
(PDF) - Features the text of the Act from FindLaw. - Homeland Security Cultural Bureau
- Providing executive and public awareness of the role that culture can play in both endangering, as well as promoting, a secure nation. - Lawrence Livermore National Laboratory (14)
- Napolitano, Janet - Secretary of Homeland Security (1)
- National Homeland Security Knowledgebase
- Features a collection of links on homeland security related topics and resources. - Office of Federal Protective Service
 - Ready.gov
- Make a kit, make a plan, and be informed. From the U.S. Department of Homeland Security. - U.S. Immigration and Customs Enforcement
- Provides news, contact information, careers, and details about Immigration and Customs Enforcement, the largest investigative branch of the U.S. Department of Homeland Security. - United States Computer Emergency Readiness Team (US-CERT)
- Manages the National Cyber Alert System. - United States Secret Service (3)
- US-VISIT Program
- Features a fact sheet for the programme. - White House: Homeland Security Department
- Official White House site discussing issues of Homeland Security and Counterterrorism. - Wikipedia: United States Department of Homeland Security
- Article about the U.S. Department of Homeland Security, a cabinet level department with the task of protecting the United States.
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