FAS Project on Government Secrecy 
The Project works to challenge excessive government secrecy and to promote public oversight in national security affairs.
http://www.fas.org/sgp/Institute for Defense Analyses
Conducts research and provides information to the United States Department of Defense.
http://www.ida.org/
US National Security Council (NSC)
The President's principal forum for considering national security and foreign policy matters with his senior national security advisors and cabinet officials.
http://www.whitehouse.gov/nsc/
Business Executives for National Security
BENS is a national, nonpartisan organization of business leaders who apply the lessons of their successful businesses to making our country safer and more secure.
http://www.bens.org/
The Center for Security Policy
Analyses of current and breaking security policy issues.
http://www.centerforsecuritypolicy.org/
National Security Website
A clearinghouse for reporters, researchers, and concerned Americans interested in publications, policy experts, and weblinks on a wide spectrum of national security issues.
http://www.heritage.org/research/nationalsecurity/
Anser Institute for Homeland Security
Provides coverage on the issue and information on current events, a weekly newsletter, bibliography, virtual library and links.
http://www.homelandsecurity.org/
National Security Agency (NSA)
Offers virtual tour of National Cryptologic Museum. Includes narratives and archives illustrating intelligence gathering practices in the 1940s (VENONA) and in helping manage the Cuban Missile Crisis.
http://www.nsa.gov/
National Security - ACLU
Information and resources from the American Civil Liberties Union - Freedom Network.
http://www.aclu.org/natsec/index.html
