Katie Couric looks back at the day that the 16th Street Baptist Church was bombed in Birmingham, AL. After the bodies of four girls are found buried in the rubble, the crime becomes a turning point in the struggle for civil rights.

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NBC's Rehema Ellis interviews Congressman John Lewis, Selma Mayor Joe Smitherman, and others about the day known as "Bloody Sunday," when brutal police attacks on civil rights marchers in Selma, AL, shocked the nation.

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This iCue Mini-Documentary describes the early-20th-century setbacks in civil rights, as racial segregation was common on rail cars, in schools, and in the workplace.

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Historian Josh Brown analyzes a political cartoon from the magazine Harper's Weekly that focuses on former Confederate President Jefferson Davis, and Hiram Revels, the first black senator in history.

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Professor Eric Foner of Columbia University explains the origin of "forty acres and a mule."

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This iCue Mini-Documentary describes how, to assure citizenship to blacks after the Civil War, Congress proposed the 14th Amendment. However, most Southern states refused to ratify it.

This iCue Mini-Documentary describes the establishment of the Georgia colony by philanthropist James Oglethorpe as a refuge for criminals from England's debtor prisons. At first he banned slavery for fear of an African insurrection, but eventually relaxed his rules to attract more immigrants.

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This iCue Mini-Documentary describes how the production demands of World War I draw blacks and whites from rural areas to factory jobs in the cities. However, along with that migration came racial tension.

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This iCue Mini-Documentary looks at the different goals of the Colored Farmers' Alliance and the white Farmers' Alliance.

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