invisible government

"Angel is next" is Webster Tarpley onto something?

Webster Tarpley believes this is a focol point of 9/11 truth that people should be talking about more.
For those who have read Synthetic terror know exactly what im speaking of.
On his last saturday radio show he explained it again but i still could not follow.
I find it a little confusing personally, why this is such an important clue?
Does the general public know that air force one is called "angel"?
Was the threat "angel is next" from the outside or is there evidence to say it was from the inside of the intelligence apparatus?

Webster explains that this is an important clue because he believe it was a threat against bush from within the invisible government, making him at that very moment decide to go along with the 9/11 plan or not. However i am not totally convinced of this and would like more information. From this report it sounds like Bush himself was the one referring to air force one as angel, but webster seems to be getting his information from a different report. Here is a cbs report on what i speak of....

The President's Story
The President Talks In Detail About His Sept. 11 Experience

'....There was word Camp David had been hit. A jet was thought to be targeting Mr. Bush’s ranch.