During the upheaval of the civil rights era, the U.S. president and the nation's leading agitator had a little-known, behind-the-scenes relationship. Lyndon Baines Johnson and the Rev. Martin Luther King, Jr. worked together through telephone calls and emissaries on a shared goal: Equal rights for black Americans. Michele Norris talks to Nick Kotz, author of Judgment Days: Lyndon Baines Johnson, Martin Luther King, Jr. and the Laws that Changed America.

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