tavis: good evening. from los angeles, i am tavis smiley. tonight, we begin a new series, called road to health. it is a look at how we can rebuild help the communities. my guest heads of the ucla health sciences department and is host of an upcoming pbs series called "designing help the community's." it is often the poor and disenfranchised who suffer the most due to environmental health problems. we are glad you can join us, a conversation with dr. richard jackson, coming up right now. >> every community has a martin luther king boulevard. it's the cornerstone we all know. it's not just a street or boulevard, but a place where walmart stands together with your community to make every day better. >> the california endowment.