Central Intelligence Agency (CIA): an independent US Government agency responsible for providing national security intelligence to senior US policymakers.

Department of Defense (DoD): the starting point for finding US military information online. The mission of the DoD is to provide the military forces needed to deter war and to protect the security of our country. The department's headquarters is at the Pentagon.

Department of State: sets forth the Secretary of State's direction and priorities for both organizations in the coming years. The current Secretary of State is Condoleeza Rice.