c) statements, the modification of which might cause harm to the national security, including harm to the national defense or foreign relations of the United States;
Alternative Definitions and Approaches," Paper presented at a Workshop on Environment and Security at the National Defense University, Washington, DC ( August).
... reports kept and filed by Federal agencies "unless those records and reports are specifically required by Executive Order to be kept secret in the interest of the national defense ...
Classified Information. Exemption 1 protects from disclosure national security information concerning the national defense or foreign policy, provided it has been properly classified ...
... of such information is specifically prohibited by law and such information is specifically required by Executive order to be kept secret in the interest of national defense or the ...
... variations, tolerances, and exemptions to and from any or all provisions of this Act as he may find necessary and proper to avoid serious impairment of the national defense.
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