[Young Werther]

That is not a complete Flight Plan. It does not contain the SOB figure. SOB is the acronym for souls On board and documents the number of aircrew and passengers on a given flight. It derives from an earlier maritime convention.

Some people have suggested that this was a special "gift" for political doners!

[GovernmentShrinker]

I would be very surprised if flight plans for either of the AF1 planes ever include and “SOB” figure. That sounds like exactly the sort of super-classified information that DoD and Secret Service would not want floating around on flight plans that go to the FAA. How many people are on board AF1 or its decoy is “need to know” type information, and the FAA has absolutely no need to know this.