William "Bill" Edward Binney is a former intelligence official with the United States National Security Agency (NSA) and whistleblower. He retired on October 31, 2001, after more than 30 years with the agency.

Citizenfour is a 2014 documentary film directed by Laura Poitras, concerning Edward Snowden and the NSA spying scandal. The film had its US premiere on October 10, 2014, at the New York Film Festival and its UK premiere on October 17, 2014, at the BFI London Film Festival. The film features Snowden and Glenn Greenwald, and was co-produced by Poitras, Mathilde Bonnefoy, and Dirk Wilutzky, with Steven Soderbergh and others serving as executive producers. Citizenfour received critical acclaim upon release, and was the recipient of numerous accolades, including Best Documentary Feature at the 87th Academy Awards. This film is the third part to a 9/11 trilogy following My Country, My Country (2006) and The Oath (2010).