Last summer, Dallas Police Chief David Brown was thrust into the national spotlight as he teamed with Mayor Mike Rawlings to lead the city through the aftermath of a shooting spree that left five officers dead. The now retired chief joins us to talk about helping to heal the department he once lead – and about his lifelong commitment to his hometown – which he writes about in his new memoir, “Called to Rise: A Life in Faithful Service to the Community That Made Me” (Ballentine Books).