HARDtalk

Hardtalk brings together two high flying corporate executives whose careers crashed after they questioned the wisdom and integrity of their top bosses. Both Sherron Watkins formerly of the fallen US energy giant Enron and Paul Moore once of the broken British bank HBOS are routinely referred to as whistle-blowers - but has the final whistle really been blown on a corporate culture which brought the West's financial system to the brink of collapse? They talk to Stephen Sackur.