Jazz singer Nina Simone pictured in 1978, the year she recorded and released the song "Baltimore." J. Minhan/Hulton-Deutsch Collection/Corbis hide caption

itoggle caption J. Minhan/Hulton-Deutsch Collection/Corbis

Public Enemy on stage in 1988. The group will be inducted into the Rock and Roll Hall of fame Thursday. Suzie Gibbons/Redferns/Getty Images hide caption

itoggle caption Suzie Gibbons/Redferns/Getty Images

A levee on the Mississippi River in Louisiana during the Great Flood of 1927. Hulton Archives/Getty Images hide caption

itoggle caption Hulton Archives/Getty Images