01 Many theories and conspiracies stated that there were some internal reasons behind the attack. Many experts proposed theories in support of their case. Some of these conspiracy theorists were able to make their case, and some could not.

02 Greed is a factor that can make any human do anything in this world. Some of the theorists believe that money could be a factor that could have inspired the big players of the market. In the days leading up to the 9/11, there was an increase in the put-to-call ratio for United Airlines and American Airlines.

03 NORAD is the agency that deals with internal security of the airspace. They have the authority and power to destroy or tail any hijacked plane in the American airspace. On the morning of the attacks, NORAD told their planes to stand down even when they could have prevented the collision of the planes with the Pentagon and Twin Towers.