Terrorism is at this point one of the main threats that decision makers in the field of national security have to deal with especially in the United States. The issue has been raised mainly after the events from 9/11 2001, but have been a constant concern for the law enforcement agencies since the beginning of the 90s and even before. The United States have a particular way in which it deals with homeland security issues given the nature of its administrative and political organization. The national, regional, and local law enforcement agencies and subdivisions are the ones that provide the legal and operational framework and background for actions to be taken at all the levels that could be affected by a terrorist threat or by any time of threat posed at the homeland security.

The present paper researches the role national security agencies have, with due regard for the shared...
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