A true story inspires the moving tale of a mule that played a key role in the civil rights movement- and a young boy who sees history anew.Sitting on a bench waiting for his mother, Alex spies a mule chomping on greens in someone's garden, and he can't help but ask about it.""Ol Belle?" says Miz Pettway next to him. "She can have all the collards she wants. She's earned it." And so begins the tale of a simple mule in Gee's Bend, Alabama, who played...