Australian Arnold Rosen is celebrating his 70th birthday with his family aboard a cruise ship in the Mediterranean.<br /> <br />By coincidence, on the same cruise ship, the American Gus Smith and his family are also celebrating his 70th.<br /> <br />The two men meet. They are identical in appearance but clearly not related. Arnold is the son of Jewish Holocaust survivors, while Gus' parents were German – indeed, his father was a rabid anti-Semite.<br /> <br...