Juneteenth. The commemoration and holiday celebrating the emancipation of those who had been enslaved in the United States, plus the historical significance of the day. Guests: Annette Gordon-Reed, Harvard Univ. and author of, “On Juneteenth,” L’Merchie Frazier, MAAH museum, Dr. Kellie Carter Jackson, Wellesley College, Imari Paris Jeffries, King Boston.