It was screened in the main competition section at the 70th Venice International Film Festival, and premiered at the Telluride Film Festival on August 29, 2013 [REF].
The documentary has an 84% "Certified Fresh" rating on the critical review aggregation website Rotten Tomatoes, with the summary, "Viewers hoping to see Donald Rumsfeld admit making mistakes in public office may find The Unknown Known frustrating - but no less fascinating."[REF]