Presidential Historians

In a collection of previously broadcast conversations with presidential historians: Stanley Kutler talks about what he experienced while researching for "Abuse of Power: The New Nixon Tapes." Michael Beschloss introduces "Taking Charge: The Johnson White House Tapes, 1963-1964," which contains hundreds of hours of clandestine recordings of President Lyndon B. Johnson. Jeff Shesol presents "Mutual Contempt: Lyndon Johnson, Robert Kennedy, and the Feud That Defined a Decade." Philip Zelikow and Ernest May, the editors of "The Kennedy Tapes: Inside the White House During the Cuban Missile Crisis."