Most people know Lorraine Hansberry for her groundbreaking play, “A Raisin in the Sun.” But as filmmaker Tracy Heather Strain explains in this Peabody Conversation, she was also a radical activist. The American Masters documentary “Lorraine Hansberry: Sighted Eyes/Feeling Heart” is an intimate portrait of an innovative artist who made an indelible impact on American culture, especially among black writers, directors, and actors. It won a 2018 Peabody Award “for its testament to Lorraine Hansberry’s life and homage to her work.”