Juneteenth is America's newest federal holiday, thanks in part to the work of a 96-year-old activist from Texas, Ms. Opal Lee. Opal and her granddaughter Dion Sims explain why the holiday is a "unifier" and share some simple things you can say and do to both celebrate Juneteenth and honor its history. #juneteenth #juneteenth2023 #opallee #blackhistory