Order to Shoot

Remember all that talk about Bush giving the "order to shoot" down planes on 9/11? It was never clear if he really did despite Cheney's side of the story. (more here) I find it interesting that the topic wasn't even approached in regard to last week's "scare." TV reported that the plane certainly would have been shot down if it had continued towards the Whitehouse, but meanwhile, Bush was obliviously riding his bicylce. There has been discussion about why Bush wasn't notified until after it was over...but what about the rules of engagement? Right after 9/11, the MSM went on and on about how only the President could make that call. Has anything changed? I am having troulbe finding out what the law is...and what has changed (if anything). stay tuned...