It looks like deceased UBL was closer to the truth on damage assessment direct and indirect from the events of 9/11/01. Many experts use the figure of $80B in direct damages. UBL used the figure of $500b.
Of course the political fallout was enormus both domestically and internationally. I would argue the principle domestic fallout was the use of “fear” by the George W. Bush Administration to gain re-election in 2004!
As we know the primary impact of the BUSH re-election domestically was no effective regulation of the ENERGY or FIRE sector of the economy and continued WARFARE in Iraq and in Afghanistan!