Barbara Kopple
1976

It's a documentary about a miner's strike in Kentucky.
She really gets involved in the life of the town, and in the strike. You see the cameraman getting beat up by scab labour thugs. You see the funeral of the boy who was shot by the same thugs.
It made me cry.

It's a total classic in the field and has received lots of official recognition.

And the music is AMAZING.