"I looked out over the old harbour of Havana, where Alberto Korda took his famed portrait of Che ... It was taken on 4 March 1960 at a funeral service and not published until seven years later, after Guevara's death. I mulled over how, since that time, the photograph - like the posters and murals derived from it - has become associated with every site of struggle from Soweto to the Seattle protests against the World Trade Organisation. That image continues to be one of the most iconic in contemporary culture, with reproductions available in the most surprising places."