Evidence points to the Israeli Mossad as the operators and executors of the 9/11 attacks.
That said, I don't think they would be so bold as to dare such a massive operation without guarantees from foreign partners. We know elements with the US/UK security & media establishments were complicit.
However, the ultimate question becomes, who and where is the architectural level planners of the attack, the subsequent narrative et al?
Does it terminate in the City of London? Globalist families intertwined with the UN, CFR & Trilateral Commission?