what really happened?

A challange

In her article dissing blogs that question the official story of 9-11 (see below), Ms. Stillwell obviously picked examples from the blogs that she found most easy to dismiss and ridicule. Equally obviously she stayed away from any facts that really do call into question the official story of 9-11.
So here is an open and public challenge to Ms. Stillwell. We have all seen the video tape of the President just sitting in that classroom reading about goats after being told of the second plane impact.
So, let's keep the following facts in mind.
1. There are supposedly an unknown number of hijacked planes flying over the country crashing into buildings.
2. Bush's presence at the school was announced in the media three days in advance. So the Hijackers knew where he was going to be.
3. There is an airport just 4 miles away from the school where Bush was sitting.
So, Ms. Stillwell, since you seem to imagine you have a grasp on reality, please answer the following.
How did the United States Secret Service Protective Detail, know they did not need to immediatly move the President? How did they know they did not need to toss him into his bomb-proof limo and start driving in any direction to foil a possible inbound?
How did the United States Secret Service Protective Detail know that by leaving the President where he was, they were not making targets of all those students and teachers?
How did the United States Secret Service Protective Detail KNOW FOR A FACT THAT PRESIDENT BUSH WAS NOT A TARGET THAT DAY?
Feel free to write Ms. Stillwell and ask her those questions.

UPDATE: The San Francisco Chronicle has retracted a portion of Stillwell's article, predictable, dealing with the "no plane at the Pentagon" hoax. As of this update, there has been no reply from either Stillwell or the Chronicle regarding the questions raised in this article.