During the same summer as Woodstock, over 300,000 people attended the Harlem Cultural Festival, celebrating African American music and culture, and promoting Black pride and unity. The footage from the festival sat in a basement, unseen for over 50 years, keeping this incredible event in America's history lost — until now.

Cast: Stevie Wonder, Lin-Manuel Miranda, Chris Rock, Tony Lawrence, Nina Simone, B.B. King