Well, think about it guys. These guys are praying out loud in Arabic in a group aboard plane, post 911. These pasengers don't know what they are saying......for all they know they could be saying their last praises to Alah before taking down the plane.
Don't most hijackers pray out loud in Arabic right before they are gonna do something bad to the plane/people?
The part that is messed up is not that they were removed from the plane for suspicious begavior, but rather that the airline refused to sell them tickets or put them on another flight after these guys were cleared by the FBI. They also placed them on a no-fly list.
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