Many state residents don't have insurance adequate enough to cover dental care. Nearly 57 million people in the United States live in areas federally designated as lacking basic access to dental care. In West Virginia, where shrinking populations and a fading coal industry have helped contribute to high poverty rates, many don't have insurance adequate enough to cover dental care. The scenario has led to a dental health crisis in the state. But one nonprofit medical group that deploys a mobile clinic staffed with health professionals is reaching some West Virginia residents in underserved regions. NewsHour Weekend Special Correspondent Simon Ostrovsky reports on the third of a three-part series examining the findings of a United Nations Special Rapporteur for Extreme Poverty. This story is part of an ongoing series called "Chasing the Dream," which reports on poverty and opportunity in America.