...p.s. By the way, it would have only taken one gun -- or the crowbar -- or multiple hands.:-)
Perhaps it wasn't "Flight 93-ish" enough to unite the other passengers...who were perhaps more in a "Kitty Genovese-ish" mode/mood.

I have to agree. How can a bus load of people allow someone to get beheaded?
Did they all run off of the bus or something, or did they stay on it while this was happening?
I think it's a duty by just being a human being to take action of some sort.