You don't die from the bacteria itself. You die from a certain toxin it produces.
By the time you get symptoms, the amount of toxin in your body has teached lethal levels. At that point, you can kill every bacteria in your body and you will still die.
So it was inhaled. From where a five second air pocket,dirt,a merry go round ride?
Do you think they would risk public panic telling us if they DID know something more of a terror attack,is the question to answer and ponder. No tin foil hat needed to think about this.
Good overview. This is exactly what I read about it yesterday. It's the toxin that kills. You have to take antibotics before you get symptoms.