The world was still reeling from the assassination of John F Kennedy when photographer Robert H Jackson was on hand to catch the decisive moment (Cartier-Bresson would be proud) that a vigilante idea of justice was metered out to the man who had changed the course of history. What’s striking in the image is the incongruity of all. It almost looks like a normal crowded scene of people, but for Oswald grimacing and the assassin, Dallas nightclub owner, Jack Ruby holding a gun. The photo won a Pulitzer Prize for its author. Ruby was tried for murder, but appealed his conviction. He died before the start of a new trial. The power of the image lives on though.
