On Thanksgiving Day in 1973, filmmaker David Hoffman brought B.B. King, Joan Baez and other artists to New York's Sing Sing Prison to perform. By then, the penitentiary was known as the Ossining Correctional Facility. Hoffman was given permission to film them performing. To read my WSJ interview with B.B. in 2011, go here.
Here's the the entire B.B. King…