Europe is still an attractive destination for African migrants prepared to risk their lives on dangerous journeys across the Mediterranean Sea, but as European borders become harder to breach, growing numbers are crossing the desert from Africa into Israel.  The migrants find themselves completely at the mercy of the Bedouin people smugglers who they rely on to make the crossing.  In an exclusive report, the BBC's Rupert Wingfield-Hayes met some of those being held in Egypt's Sinai desert and the people traffickers profiting from the trade.  (Watch the video report)