As viewers of the HBO series "The Gilded Age" will know, there's a long important history of Free Black communities in Brooklyn. Author Prithi Kanakamedala, professor of History at Bronx Community College of the City University of New York, discusses her new book, Brooklynites: The Remarkable Story of the Free Black Communities that Shaped a Borough which tells the stories of four families from Free Black Brooklyn communities in the 19th century.