This week in Mal’s World, Mal Vincent previews the next film in his annual festival at the NARO Expanded Cinema in Norfolk, “Witness for the Prosecution.” The movie stars legendary actress Marlene Dietrich. Mal reflects on the magnetic icon’s storied career, her musical performances, and how she once enjoyed the gift of a Virginia ham he had sent to her. For more on the festival, visit http://www.narocinema.com/mals-movies.php.