What has been called the most famous photograph in the world, and a symbol of the 20th century, began as a spur of the moment snapshot by a Cuban photographer. Alberto Korda transformed a simple photo into a world famous portrait of a larger than life revolutionary. Korda's 1960 photo of Che Guevara's defiant face has traveled the world in many forms. It shows up wherever people struggle for freedom and human rights. And in the 21st century, the controversial...