> > Don't you have to know whose mug shot you are looking for before you
> > search for it? How did they know?
>
> The names are obtained easily: get the passenger manifest and remove
> Mark, Bob, Michael, Sharon, Cynthia and Tim. That leaves you with the
> ferriners.
I can't remember which of the flights it was, and as far as I know it was only one of them, but the flight attendants were supposed to have told the air traffic controllers which seats the hijackers had been sitting in. Not too difficult with that information to find out who they were.