Using a Leica M2 with a 90mm lens, Cuban photographer Alberto “Korda” Díaz snapped the iconic photograph of Ernesto “Che” Guevara during a mass funeral for the victims of a mysterious series of explosions in Havana harbor that killed at least 75 people 1960. The service was held the day after the tragedy, and Korda, who was Castro’s official photographer at the time, managed two photos of Guevara as he briefly stepped onstage to......