Enlarge this imageA detainee cell in Camp six inside the U.S. reformatory at Guantanamo Bay, Cuba in February.Ben Fox/APhide captiontoggle captionBen Fox/APA detainee cell in Camp six inside of the U.S. penitentiary at Guantanamo Bay, Cuba in February.Ben Fox/APThe U.S. has transferred nine Yemeni detainees with the Guantanamo Bay prison facility to Saudi Arabia. The…