When French villagers helped Jewish refugees hide from the Nazis during World War II, some sang songs in the dense forest surrounding their town—letting the refugees know it was safe to come out from hiding. These brave townspeople of Le Chambon-sur-Lignon had answered the call of local pastor André Trocmé and his wife, Magda, to offer wartime refuge to Jews on their windswept plateau known as “La Montagne Protestante...”