Condi is a confirmed liar, IMO. She claimed to have know information connected to terrorists using planes as weapons. She was briefed on “bjoinka” prior to 9/11. And she lied about it. Bjoinka was a thwarted effort by al queda related groups to use passenger planes as weapons in a coordinated hijack.
Don’t trust Condi.
Operation: Bojinka was a plot to simultaneously explode 12 jetliners over the Pacific.
The unnamed plot to use passenger jets as missiles was something that was discovered on Ramzi Yousef's computer after he set fire to his apartment in Cebu, Philippines (where Terry Nichols frequently visited prior to the OKC bombing, oddly enough).
Just a minor correction. Your main point remains valid. Rice flat-out lied about not knowing of existing plans to use aircraft as missiles.