Katharine Gun and Martin Bright could be forgiven for fielding Hollywood's overtures with a degree of skepticism. Ever since their story was documented in Marcia and Thomas Mitchell's 2008 book The Spy Who Tried to Stop a War," Gun, the British whistleblower who attempted to prevent the Iraq War, and Bright, an investigative journalist who broke the leak, had sat down with many a filmmaker interested in translating their tale. So when veteran South African director Gavin Hood expressed interest, Gun and Bright took the development with a grain of salt. When Gun met with Hood, however, she was struck by his engagement. The end result, "Official Secrets," opens locally Friday with Keira Knightley playing Gun and Matt Smith as Bright. The movie depicts the decision Gun made in 2003, while working for British intelligence agency GCHQ, to leak a secret memo exposing plans by the American government to potentially blackmail members of the U.N. Security Council into supporting the Iraq War. "Official Secrets" probes myriad issues that remain resonant a decade and a half later, including government overreach and accountability, the toxicity of anti-Muslim sentiment, and the merits of an intrepid free press. By positioning Gun as an everywoman, "Official Secrets" asks its audience to ponder the moral dilemma at its core. "I didn't set out to be a whistleblower," Gun says. "Hopefully people will see it and come away with the thought, 'What would I do if I was in a similar situation?'"