Amid this weekâ??s interfaith memorial service for the slain police officers in Dallas and ongoing protests against police killings of black men, many faith leaders have been calling for dramatic changes in race relations, law enforcement policies and the pursuit of justice. Host Bob Abernethy and Managing Editor Kim Lawton talk about the current challenges and prospects for healing with Lisa Sharon Harper of the Christian social justice group Sojourners and author of The Very Good Gospel: How Everything Wrong Can be Made Right.