Scottish explorer Mungo Park was among the first Europeans to view the Mandinka tribe's masked dancers who were known as Maamajomboo. He translated the word as "mumbo jumbo.' This 1797 illustration from Park's book, "Travels In The Interior Districts of Africa" shows a view of Kamalia village in Mandinka country. DeAgostini/Getty Images hide caption

itoggle caption DeAgostini/Getty Images

Workers crowd into the backs of trucks in the opening scene of 1960's Harvest of Shame. CBS News/YouTube hide caption

itoggle caption CBS News/YouTube

Historian Patrick Grossi stops in front of 3711 Melon St. during a walking tour through Mantua. On Saturday, this house will be torn down — and will receive an elaborate memorial service. Emma Lee/WHYY hide caption

itoggle caption Emma Lee/WHYY

Ralph Ellison in 1957, four years after his novel Invisible Man won the National Book Award. Ellison died in 1994. James Whitmore/The Life Picture Collection/Getty Images hide caption

itoggle caption James Whitmore/The Life Picture Collection/Getty Images

The Neue Galerie exhibit's empty frames represent paintings that were lost or destroyed by the Nazis. They appear beside works that survived Nazi rule, like George Grosz's Portrait of the Writer Max Hermann-Neisse (lower right). Courtesy of Hulya Kolabas for Neue Galerie New York hide caption

itoggle caption Courtesy of Hulya Kolabas for Neue Galerie New York

A typical Russian kitchen inside an apartment built during the early 1960s, when Nikita Khrushchev led the Soviet Union — what later became known as Khrushchev apartments. Courtesy of The Kitchen Sisters hide caption

itoggle caption Courtesy of The Kitchen Sisters

Navy Lt. Edward O'Hare, for whom Chicago's O'Hare Airport is named, sits in the cockpit of the plane in which he shot down six Japanese heavy bombers in WWII. Associated Press hide caption

itoggle caption Associated Press

In the HBO adaptation of Larry Kramer's 1985 play, The Normal Heart, Mark Ruffalo (right) plays Ned Weeks, who begins to seek answers after he observes a mysterious disease claiming lives in his gay community. Joe Mantello plays a member of the AIDS service organization, Gay Men's Health Crisis. Jojo Whilden/HBO hide caption

itoggle caption Jojo Whilden/HBO