If you don't say it : they won't know it! : remain vigilant.

Bibliographic Details
Corporate Author:	United States. Defense Threat Reduction Agency. Security and Counterintelligence Directorate
Format:	Government Document Photo
Language:	English
Published:	[Fort Belvoir, Va.] : Security and Counterintelligence Directorate, Defense Threat Reduction Agency, [2003?]
Subjects:	National security > United States > Posters. United States > Defenses > Posters.

Evans: US Documents (Annex 5th floor)