During the Kennedy presidency, Dulles selected Helms to testify before Congress on Soviet-made forgeries. Following the 1961 Bay of Pigs fiasco, President Kennedy appointed John McCone as the new DCI, and Helms then became the DDP. Helms was assigned to manage the CIA's role in Kennedy's multi-agency effort to dislodge Castro. During the Cuban Missile Crisis, while McCone sat with the president and his cabinet at the White House, Helms in the background supported McCone's significant contributions to the strategic discussions. After the 1963 coup in South Vietnam, Helms was privy to Kennedy's anguish over the killing of President Diem. A month later Kennedy was assassinated. Helms eventually worked to manage the CIA's complicated response during its subsequent investigation by the Warren Commission.