This NYT piece compares life expectancy and health outcomes in Fairfax, Virginia, a wealthy county of Washington suburbs, with McDowell County, West Virginia, a poor coal-mining county in Appalachia. It describes some of the differences in living conditions that have led to a 15-year gap in life expectancies between the two counties. The differences in health outcomes in these counties are attributable to factors that have led to sharp increase in gaps in life expectancy by income across the country.