The 14th secretary of the Smithsonian Institution discusses the importance of Juneteenth, the Black Lives Matter movement and the need to face uncomfortable truths about our history.

Linda Thomas-Greenfield talks about Black Lives Matter and her experiences as a career diplomat

Opinion writer Jonathan Capehart talks with newsmakers who challenge your ideas on politics, and explore how race, religion, age, gender and cultural identity are redrawing the lines that both divide and unite America. "Capehart" is a podcast from Washington Post Opinions, with conversations adapted from Washington Post Live events.