In honor of Labor Day, here is Barbara Kopple's 1976 documentary Harlan County, USA. Growing up in San Francisco, I heard about Bloody Thursday and other violent events in the past, but this movie helped me to understand how evil coal mine owners could be. The workers wanted better workplace safety, fair treatment and living wages. The owners wanted a no strike clause n the new contract. Management countered union proposals with gun thugs. Watch the movie.