George Sr. was the first former CIA Director to hold the office of President. Could be some folks around there (the CIA, Tenet even, perhaps) know some of the lore about junior from back then. Gotta believe the spooks keep tabs on the families of current and former big shots at the agency.

Also, I'm reading through Franken's book. There's a lot of documented stuff in there I didn't know about. Very good source for figuring out where the real blame goes for "intelligence failures leading to 9/11". The spooks have to know at least as much as Franken and his Harvard team were able to dig up. And what Franken writes (and it is thusfar undisputed) is very damning indeed.