In the Geneva headquarters of the World Trade Organisation, Stephen Sackur meets the man who for the past eight years has been leading the crusade for global free trade. Pascal Lamy will leave the WTO later this year frustrated, with the so-called Doha round of negotiations designed to spread free trade to the developing world in limbo. The flagging world economy has prompted a rise in protectionism, so has the march toward trade liberalisation ended in failure?