"For four years, from the election of John Fitzgerald Kennedy in November 1960 until after the election of Lyndon Johnson in 1964, Clint Hill was the Secret Service agent assigned to guard the glamorous and intensely private Jacqueline Bouvier Kennedy. During those four years, he went from being a reluctant guardian to a fiercely loyal watchdog and, in many ways, her closest friend."

Shortly after President John F. Kennedy's assassination, with a nation deep in mourning and the world looking on in stunned disbelief, Jacqueline Kennedy found the strength to set aside her own personal grief for the sake of posterity and begin the task of documenting and preserving her husband's legacy. In January of 1964, she and Robert F. Kennedy approved a planned oral-history project that would capture their first-hand accounts of the late President...