Oliver Stone is, of course, no stranger to political filmmaking. From the conflicts in Vietnam and El Salvador to the financial misdeeds of Wall Street and the drug war, Stone has articulated his sharp critique of American policies in films, which at their best have been impassioned manifestos of political justice. In the process he has won four Golden Globes (for Platoon, JFK, Born on the Fourth of July and the screenplay of Midnight Express). His passion for history has prompted him to examine the lives of JFK, Richard Nixon and George W Bush. He has produced documentaries on Fidel Castro and Hugo Chavez and in Untold History of the United States, an alternative reading of American history. With Snowden he turns his lens on a story, which is still unfolding: the massive NSA data leak by analyst Edward Snowden who revealed the extent of the national security apparatus. A system, which Stone told us, is a “virus” currently threatening constitutional rights.