Today's Guardian contains the obituary of Tony Schwartz, the man behind the famous and powerful 1964 campaign ad. http://www.guardian.co.uk/theguardian/2008/jun/28/usa?gusrc=rss&feed=worldnews
It was only shown once, but has become one of the most famous political ads in history. If you haven't seen it, it's worth remembering the context. There was a real fear that nuclear anniliation could come at any time. Some even regarded it as nigh on inevitable. Only two years previously the Cuban Missile Crisis had brought the world to the brink.