Obama has been pictured with a white rag before too. I am not sure what it signifies but some Freeper will know. Not sure it means he is a bin laden though. Scary implications if true.
For Saudi royalty, they wear the white head covering.
The two pictured next to him wear the red/white covering.
They are not allowed to wear the white.
Barama was pictured in a white headress, but, not a Saudi white head covering.