OK. There is an overwhelming amount of evidence, physical, circumstantial and testimonial, including statements of intent recorded in advance by the perpetrators and a full confession given without duress by the main planner of the attack, showing that the 9-11 attacks were carried out by people owing allegiance to the Al-Qaeda organisation, which has itself claimed responsibility for those attacks repeatedly. This is incompatible with the idea of 9-11 being an inside job, therefore in the absence of any credible evidence whatsoever for that latter position it is not worth serious consideration.
Dave