Maybe Zacharias Moussaoui is a bigger fish than first believed ? Or maybe the Taliban official speaking anonymously just feeds the reporters some fantasy story (look, I was so important I knew all these things regarding OBL, etc).
As a follow-up, Moussaoui was supposed to be the pilot in another attack on 9/11. And we now suspect only the pilots knew their targets, so basically the pilots were natural cell leaders for the attacks. Moussaoui might have important things to say.