Perhaps. But it is highly unlikely that it would have prevented 9/11. Not impossible but very, very improbably.
There's virtually no one could have come into the CIA in Jan-Feb 2001, taken control of the organization and then made changes in time to effect a different outcome.
“But it is highly unlikely that it would have prevented 9/11?”
My position is that after the first WTC,
ALL foreign muzzies should have been deported.
Now I don’t know if that would have prevented 9/11 but it sure as hell would have cut down enormously the likelihood.