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National security (NS) of the United States is a collective term encompassing the policies of both U.S. national defense and foreign relations.〔U.S. Department of Defense, Joint Chiefs of Staff, New Revised Edition, Joint Pub. 1-02, 1990. ''(Full text online )''〕 == Elements of U.S. national security policy == Measures taken to ensure U.S. national security include: * Using diplomacy to rally allies and isolate threats. * Marshaling economic power to elicit cooperation. * Maintaining effective armed forces. * Implementing civil defense and emergency preparedness policies (including anti-terrorism legislation) * Ensuring the resilience and redundancy of critical infrastructure. * Using intelligence services to detect and defeat or avoid threats and espionage, and to protect classified information. * Tasking counterintelligence services or secret police to protect the nation from internal threats.〔 ''Encyclopedia of United States National Security'', 2 Vol., Sage Publications (2005), ISBN 0-7619-2927-4.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「National security of the United States」の詳細全文を読む スポンサード リンク
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