Reviewed by GREG KING Documentary Director: Nicholas Wrathall. Gore Vidal, who died in 2012 aged 86, was towering figure on the American political and cultural landscape for over half a century. In this documentary we get a brief biographical sketch of Vidal, the son of a US senator, born into a life of wealth and privilege. His father had an affair with Amelia Earheart, and Vidal himself rubbed shoulders with …