In this hour of BackStory, we look at how generations of Americans have defined and redefined marriage. We explore the surprising 20th century origins of marriage counseling, as well as a panic over child brides that swept the nation in the late 1930s. The Guys take a look at how the experience of marriage changed for enslaved people after Emancipation. And we visit a modern-day wedding in Elkton, MD — the former get-hitched-quick capital of America.