"John McCone came to the CIA as an outsider. An industrialist and an engineer by training, he replaced veteran spymaster Allen Dulles as director of central intelligence in November 1961, after John F. Kennedy had forced out Dulles following the CIA’s bungled operation to oust Fidel Castro by invading Cuba’s Bay of Pigs. McCone had one overriding mission: restore order at the besieged CIA. Kennedy hoped his management skills might prevent a future debacle, even if the Californian—mostly a stranger to the clubby, blue-blooded world of the men like Dulles who had always run the spy agency—faced a steep learning curve.
"After JFK’s assassination in Dallas in November 1963, President Lyndon Johnson kept McCone in place at the CIA, and the CIA director became an important witness before the Warren Commission, the panel Johnson created to investigate Kennedy’s murder. McCone pledged full cooperation with the commission, which was led by Chief Justice Earl Warren, and testified that the CIA had no evidence to suggest that Lee Harvey Oswald, the assassin, was part of any conspiracy, foreign or domestic. In its final report, the commission came to agree with McCone’s depiction of Oswald, a former Marine and self-proclaimed Marxist, as a delusional lone wolf.