Nashville is booming, but these people know that doesn't mean the city is free of problems. Our guests have spent their careers trying to solve some of the most dire issues in the city and region. Featuring Ron Johnson, director of the Oasis Center's R.E.A.L. program, which aims to keep teens out of prison; Tasha Lemley, co-founder of Nashville's homeless paper, The Contributor, and owner of social enterprise Chai Wallah; and Kasar Abdulla , American-Muslim community advocate and conflict