The Pardon Snowden campaign, supported by the American Civil Liberties Union, Amnesty International and Human Rights Watch, will work through the end of Obama’s administration to make the case that Snowden’s act of whistleblowing benefited the United States and enriched democratic debate worldwide. The campaign urges citizens around the world to write to the president via the pardonsnowden.org site, as attention is to drawn to Snowden by this week’s release of the film “Snowden,” directed by Oliver Stone and starring Joseph Gordon-Levitt.