I think that it was planned by the U.S Government because NORAD (North American Aerospace Defense Command) was running practice hijackings on the day of 9/11 so that there were a total of 26 hijackings only 4 of them were real and not practice. when the planes hit tower 6 and 7 NORAD did not call off there hijackings for another 20 minuets and they did not scramble jets for and hour and twenty minutes.
their was also a conspiracy that the planes were on auto-pilot Jim Hoffman and the Scholars for 9/11 Truth and Justice are among those who have said the Flight Management Computer Systems on board Flights 11, 175 and 77 could have been loaded with a preset route that guided the planes to their targets.[93] Boeing’s technical specifications confirm that this is possible.[94] Hoffman suggests that Flight 77 performed the unusual spiral dive it made on its approach to the Pentagon with the help of the onboard computer.[95]
Some theories suggest that, rather than having preset routes entered into the planes’ on-board computers, the planes were flown by remote control. The controllers of the planes may have been on the ground or, as in the "doomsday plane" theory, in another aircraft. This theory argues that a blurry white object seen in the sky in videos of the World Trade Center, was a plane containing the remote controller of Flights 11 and 175, and that an aircraft that flew away from The Pentagon after that impact contained the remote controller of Flight 77.[96] The aircraft at the Pentagon was later identified as a E-4B National Airborne Operations Center (NAOC) plane, a militarised version of a Boeing 747-200, taking part in the Global Guardian exercise.
Remote control of Boeing aircraft is only possible with the installation of additional software and even then the pilots can override control by moving the yoke.[97] Theories of remotely controlled aircraft have been criticised for ignoring phone calls made by passengers which state that their aircraft had been hijacked.[98]
The final piece that makes me belive in this is there were many small explosions seconds before the first plane hit those were bombs in the basement and also the cut core colliums, how could two tin 747’s bring down two giant steel structers when steel melts at about 3000 degrees and jet fuel burns at 1200 degrees so what do you think now??