. . "Discovery Communications, Inc." . . "Abolishing slavery in America" . . . . . "The enslavement of millions of African Americans stands as one of the darkest periods in the history of the United States. Explore significant events in the long-fought battle to abolish it. Includes one feature and three shorter segments." . . . . . . "History" . . . . . . . . . . . . . . . . .