Airs Tuesday, March 15, at 7 p.m. Ari Shapiro and Rachel Martin will host the March 15 election Special. Primaries are held in 5 states that day: Florida, Illinois, Missouri, North Carolina, and Ohio.

Airs Sunday, February 1, at 6 p.m. In this episode Al Letson and guest producer Lu Olkowski visit a tiny town in the Appalachian foothills of Ohio where, for a century, residents have shared the common bond of identifying as African-American despite the fact that they look white. Racial lines have been blurred to invisibility, and people inside the same family can vehemently disagree about whether they are black or white. It can be tense and confusing. As a result, everyone's choosing: Am I black? Am I mixed race? Or, am I white?

Dr. Gary Joiner / Dr. Gary Joiner

During fall 1878 the southern Mississippi Valley was gripped by a massive Yellow Fever epidemic. North Louisiana, East Texas and southern Arkansas had outbreaks of the Saffron Scourge, and the frost seemed to help bring an end to the suffering.

History Matters is made possible in part by the Louisiana Endowment for the Humanities and Louisiana Cultural Vistas Magazine.

Dr. Gary Joiner / Dr. Gary Joiner

Commentator Gary Joiner reflects on the life and legacy of the late astronaut Neil Armstrong.