Answer:
The September 11th attack on United States World Trade Center was a calculated plan by the Muslim jihadist and his troupe. Osama Bin Laden, was the initiator because he has been with the US government and has learn and study under the government. This was what made him successful in carrying out the attack which has remained the history of the US.
Osama, was almost equal with the soldiers of the state and has known all their methods of striking. He had the liberty as he was not suspected to harm the country having been under the United States military and was trained and nurtured there. This event had made America to be very more conscious on her soldiers in training under them because many are been seen as spies.: