Which Pulitzer Prize winning author was featured in a 2014 documentary about Edward Snowden? 
Citizenfour: Citizenfour is a 2014 documentary film directed by Laura Poitras, concerning Edward Snowden and the NSA spying scandal. Citizenfour:  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 the Academy Award for Best Documentary Feature at the 2015 Oscars. Glenn Greenwald:  Greenwald and the team he worked with won both a George Polk Award and a Pulitzer Prize for those reports.
Glenn Greenwald