Rockefella had a ringside seat
David Rockefellas uncle was on a committee to get it the Trade centre built in 1944
World Trade Center leaseholder Larry Silverstein bought terrorism insurance two months before 9/11 and tried (im not sure if he succeed) to get a Double Indemnity payout.
In the 1944 movie 'Double Indemnity' which is about trying to get double insurance payout, there is a subtle 9 -11 nod as well as a reference to Rockefella.
It was planned for ages