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No movie has ever been able to provide a catharsis for the Holocaust, and I suspect none will ever be able to provide one for 9/11. Such subjects overwhelm art.

Roger Ebert (2012). “Roger Ebert's Movie Yearbook 2013: 25th Anniversary Edition”, p.160, Andrews McMeel Publishing
No movie has ever been able to provide a catharsis for the Holocaust, and I suspect none will ever be able to provide one for 9/11. Such subjects overwhelm art.