Full disclosure in Oliver Stone's new film about CIA whistleblower Edward Snowden

Oscar-winning documentary Citizenfour may have brought us up close to Edward Snowden, as he launched his revelations regarding US National Security Agency (NSA) surveillance in June 2013.
Yet we hardly got a sense of the 29- year-old American, who was prepared to risk it all, including leaving behind his girlfriend, Lindsay Mills, and ultimately live in exile in Russia.