Peter Bergen : He learned of al Qaeda operative ` ` the Kuwaiti '' through harsh interrogation . He says another series of interrogations determined the man was bin Laden 's courier . He says it 's not clear if the second revelation came before or after harsh techniques . And there were other key steps along the way to finding bin Laden that had nothing to do with the information derived from al Qaeda detainees , whether coercive measures were used on them or not . He says key breakthroughs came from another intelligence service and from CIA agents .
Peter Bergen : He learned of al Qaeda operative ` ` the Kuwaiti '' through harsh interrogation . He says another series of interrogations determined the man was bin Laden 's courier . He says it 's not clear if the second revelation came before or after harsh techniques . He says key breakthroughs came from another intelligence service and from CIA agents .