So now the supporters of the official "you must be on fucking crack if you believe this" story are rewriting it to allow themselves wiggle room around a topic that cannot otherwise be explained.
RE-writing? I'm sorry, when was it ever said differently? When was it ever said that immediately after the first plane crashed it was known that there were 3 other hijacked planes, one going to WTC and the other 2 to DC? You're saying they knew all that, but where are you getting that idea from?
And besides all that, the President was in Florida. Even if it was known immediately (which it wasn't), then why would they consider the President to be threatened by attacks in NYC and DC? Florida's a long way away. Without a credible threat to the President, why should they have reacted as though there was a threat?
So what we actually have is that the Secret Service did NOT know more than that a plane hit the WTC. And they did not know it was an attack. AFTER the 2nd plane they knew it was an attack, but there was no known threat to the President. So from a protection standpoint, there was nothing to protect him from.