Basic fact #1: You can't get the President to a safe location without moving him.
That doesn't admit your point. If anything, it *refutes* your point. I never said the school was safe. I said it was safer than moving him. Yes, an unkown location is safer than a known one. But Basic Fact #1

out that you have to get him there to make him safe end *every* security expert will tell you the highest risk to the President is in transit.
How about this...
Basic Fact #0: Moving the President incurs the highest risk to his life while in transit.
Basic Fact #0.1: Tracking the President's movements is always easy because we always know where he is.
Logical Conclussion #1: If we move the President - he will be at extreme risk the entire time he is in transit and his position may still be known when he gets there because we can't be sure there won't be someone tracking the caravan.
Logical Conclussion #2: Staying put controls the factors because we already know this building is secure and we know the layout of the building and can control complete access to it.
The only risk to Bush that day in the school would be from one of the rogue airplanes and that is greatly reduced by the fact that noone outside of the school knew his relative location in the school so even the best pilot wouldn't know wher in the school to target.
I'll refer you back to the map I sent sometime back. It is one big elementary school. An airliner crashing into it would only take out 20%-25% of the school, meaning the President had a 75%-80% chance of surviving *unscathed* even if a plane crashed into the school.
That is an acceptable risk when compared to the additional unknown risk factors moving him to the limo and then caravaning down the road.
That is *exactly* how the Secret Service evaluated the situation. And that is exactly what the SITREP would have been between the head of the Secret Service and the President.