September 11 on its Twentieth Anniversary: An Assessment of US Domestic and Foreign Policies within the Framework of the Copenhagen School

September 11, 2001, was a very important milestone for both the USA and the rest of the world. The first major terrorist attacks were carried out at the beginning of the millennium and resulted in the new concept of "preventive war" as a foreign policy strategy in international relations. Terror attacks have been associated with war by the USA and it has been accepted as a justification for a legitimate intervention (preventive war) by establishing links with some states. While most of the academic papers focus on the operations carried out by the USA against these attacks, another noteworthy point is that the American government has turned its attention from domestic to foreign policy through securitization. Besides in a broader perspective, it is the efforts to spread the securitization concept implemented by the USA to the global level through international organizations such as the United Nations Security Council and NATO that is a crucial point for this context. In this context, in this article, a retrospective evaluation of the policy pursued by the USA through securitization in the international arena is made and its reflections on the international arena are examined