Criminal justice reporter Maurice Chammah recently wrote an op-ed for the New York Times about the power of music programs in prison. He says at a time when the criminal system is at an impasse, music, and art can cultivate hope and dignity for prisoners and possibly change how we think about the people who make it. "It allows you to really hold in your mind anger about a crime, and then separately an understanding that this is a human being and there's more to say about them than their crime." Chammah also talks with us about the rich history of prison music in the U.S., dating all the way back to the 1930s.