Mark Shriver, president of Save the Children Action Network, talks about the importance of our country's children, his father, Sargent Shriver, what it's like being a Kennedy and his quest to get an interview with the pope.

Ambassador Susan Rice on the challenges of national security

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.