The 11 September 2001 attacks (often referred as 9/11) were a suicide attacks by Islamic terrorist group al-Qaeda in United States such as the World Trade Centre, the Pentagon, and supposed to attack Washington, D.C. . There were almost 3,000 people tragically killed in this attack. This attack was so phenomenal that it became a global concern. The following are the four levels of analysis to explain why the attacks happened and whether it provides a comprehensive understanding of events in the international