Not quite
The participants in a scheme need not necessarily be its architects, nor are they always willing. In any event, I think it likely that there is some sinister connection between WTC, Flight 800, and the OKC bombing. All of these affairs have been covered-up.
I don't think there's any compelling evidence that the passengers brought down flight 93. There are some indications, however, including eyewitness accounts that this flight was in fact shot down.
Finally, stopped or not, nobody has been able to explain Delmart Vreeland's sealed prediction about 911.
There's more. Later.
sp