“Snowden” (** out of four) was a hugely disappointing true story of Edward Snowden (Joseph Gordon Levitt) who was a brilliant NSA technician but later became a whistle-blower of their illegal surveillance techniques in what became one of the biggest government scandals of the last decade. You would think this fascinating political material would be a perfect fit for director Oliver Stone but film is surprisingly dull, superficial, and it goes on forever. Gordon-Levitt is rock-solid as usual as Snowden but film hardly tells you anything about him or what his motivations were. Shailene Woodley makes her mark again as Snowden’s girlfriend and conscience.