Back away... nothing to see. Six months in the country (and probably lied on their visas) and they don't know the difference between a school bus and public transportation. Oh, but then they did know the difference since they knew it was going to the school and they several stories of why they wanted to go there. Anyone bother checking to see if they had attended even one day of English Language school? Nothing to worry about, Atta & Co. were also "students".
...didn't know difference between school bus and public transportation..'
and, guess they were confused about where they came from...Morocco or Saudi Arabia. And, yes, why did driver let them on the bus to begin with??
While America sleeps..