Edward Snowden was the agent behind the 2013 revelations of the National Security Administration’s vast international and domestic spying operation. But Snowden claimed he didn’t want to be the focus of the story. In Laura Poitras’s extraordinary 2014 documentary, Citizenfour, Snowden twice demurs: “I’m not the story here,” he insists, and then, later, “I don’t want to get myself into the issue . . . where it takes away from the stories that are getting out.”