 The movie was shot from September 1968 to February 1970. The answer  print (173 minutes) was first approved January 22, 1971, but the  National Film Board of Canada, which was producing the movie, has  decided to ban it for legal and political reasons. It wasnt release  until October 13, 1976 in a 158 minutes version. The banned version  wasnt release until October 2004 in DVD.