Stephen Sackur is in Geneva to talk to the head of the World Trade Organisation Roberto Azevêdo. The WTO is supposed to oversee free and fair global trade but right now, the organisation risks looking impotent and even irrelevant. President Donald Trump is making good on his promises on tariffs and protectionism and the Chinese are threatening to respond in kind. What can the WTO do to avoid a global trade war?(Photo: Roberto Azevedo at the second day of the summit of G7 nations 2015. Credit: Sean Gallup/Getty Images)