Steve Martin and Edie Brickell’s new bluegrass musical, 'Bright Star' is currently on Broadway and it looks it is going to be a runaway hit. The events of the show were inspired by the real life story of William Moses Gould Helms, the Iron Mountain Baby, who was thrown from the Iron Mountain railway when he was born and was saved by a Civil War vet. Now, Martin and Bright Star director, Walter Bobbie are opening up about how the story shaped the musical.