Defense, Homeland Security & National Security
- CREST (CIA Records Search Tool): 25-Year Program Archive
- DTIC Online (Defense Technical Information Center)
- Foreign Relations of the United States
- Homeland Security Digital Library [Some collections require University IP for access.]
- Military and Government Collection (EBSCO) [ULID and password required]
- National Security Archive (George Washington University)
- Science.gov
- World Factbook (CIA)