There are two conspiracy theories of what happened on 9-11.
The government side has been told by the Bush and Obama administrations and by all five Democrats and all five Republicans on the 911 Commission as well as the corporate news media.
Their version is well known.
An alternative theory of 9-11 is that the four planes were electronically hijacked by what is know as the Command Transmitter System (CTS) which is made by SPC International whose CEO had been Rabbi Dov Zakheim in the 1990s.
CTS can remotely control up to eight planes at once.
Rabbi Zakheim, who was a member of the Project for a New American Century along with Richard Perle and Dick Cheney, was the Comptroller of the Pentagon on 9-11.
On 9-10-2001 Donald Rumsfeld admitted at a press conference that 2.3 trillion dollars in Pentagon money from the previous Clinton and Bush administrations was missing.
On 9-11 a bomb was detonated inside the Pentagon that killed over forty military auditors who had been attempting to track down those missing trillions.