The Saudis has provided a private jumbo jet to bring inmates home from Guantanamo Bay, giving them a hero's welcome, then sending them to a converted holiday resort for re-education. Then, the men are set free. Is this rehab program working, and can we trust the Saudis to protect themselves - and us - against Islamic extremism in the future? This week NOW on PBS partners with author and journalist Robert Lacey to investigate the surprising success of Saudi Arabia's approach to dealing with terrorists and extremists - without torture or water-boarding.