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Guests: An interview with Neil deGrasse Tyson, astrophysicist, director of the Hayden Planetarium, and author of the new book "Take Me to Your Leader: Perspectives on Your First Alien Encounter." This week's panel discussion includes Katy Tur, bestselling author and host of MS NOW's "Katy Tur Reports"; and Fmr. Speaker Kevin McCarthy, former Republican congressman who represented California's 20th district and served as the 55th Speaker of the House.