Violinist Billy Bang, died at age 63 on April 11 of cancer, was a composer of enduring, affecting music based on his military service in Viet Nam. Prayer for Peace, Vietnam: Reflections and Vietnam: The Aftermath deal directly, bravely and beautifully with Bang’s thoughts and feelings about having been a tunnel rat — a small soldier dropped into darkness to sniff out what, or who, was a danger underground. Go to my NPR interview with Billy and click “listen.”Â