Historian Erica Armstrong Dunbar discusses Ona Judge, the slave who escaped George and Martha Washington.
To the Moon! 5 required reads about outer space
Did Lizzie do it?
Legal scholar Cara Robertson, author of "The Trial of Lizzie Borden," spent more than 20 years researching and analyzing the Lizzie Borden case, which continues to fascinate and startle us almost 120 years later.