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Dalton Trumbo in 1947

Screenwriter Dalton Trumbo sits patiently during hearings of the House Un-American Activities Committee in 1947. (The author and date of the photo are unknown.) Trumbo, who was a political liberal, spent 10 months in prison after he refused to give the HUAC the names of suspected communists or testify about whether he himself was a communist. Blackballed in Hollywood for many years, Trumbo eventually was credited again for movies like Exodus (1960).