... 11 September 2001, which is well known as 9/11 tragedy, has dramatically changed the international security constellation. Some scholars believe that the threat to national security could occur at any time, in any form, and the actors itself are difficult to predict. The collapse of the World Trade Centre (WTC) in New York America, which were executed by the group of terrorists ... , was seen by many scholars as a defining moment that ended the post-cold war era. Indeed, the September 11 tragedy brought fundamental implications to the international political arena. For the United States,...

• Word Count: 1098
• Approx Pages: 4
• Grade Level: Graduate