Atomic Energy Commission
McCone became the fourth Chairman of the United States Atomic Energy Commission, succeeding Lewis Strauss and beginning a term that lasted until January 1961.
Role range: 1958-1961
Historical biography archive · Updated 2026-11-03
John A. McCone Biography and Timeline
Follow John A. McCone through 88 dated historical records for United States of America.
John A. McCone, historical timeline
A chronological timeline drawn from matching World History Database records.
88Distinct records
1 of 3Page
1958–1962Years on this page
1958
Limited Test Moratorium Proposal
McCone discussed a proposal with Secretary John Foster Dulles for limiting nuclear tests while preserving carefully controlled underground development work.
Role range: 1958-1961
United States Nuclear Test Suspension
As AEC chairman, McCone oversaw Commission responsibilities when the United States suspended nuclear weapons testing as Geneva negotiations opened.
Role range: 1958-1961
Test Ban Inspection Safeguards
McCone argued that any nuclear test suspension should rest on a bilateral or multilateral agreement containing effective inspection and verification safeguards.
Role range: 1958-1961
1959
Geneva Test Ban Verification
McCone explained AEC concerns that proposed improvements in detecting underground nuclear tests remained theoretical and required experimental validation.
Role range: 1958-1961
Underground Test Detection Concerns
McCone raised concerns about verifying underground nuclear explosions and supported further experiments to improve detection methods before relying on a comprehensive test ban.
Role range: 1958-1961
Senate Test Ban Testimony
McCone testified before a Senate Foreign Relations subcommittee about the Geneva nuclear test negotiations and the technical problems of verification.
Role range: 1958-1961
AEC Test Policy Guidance
McCone transmitted guidance to the AEC after the administration decided how to handle the expiring moratorium and future Geneva negotiations.
Role range: 1958-1961
1960
Soviet Test Detection Assessment
McCone stated that there was no technical evidence of secret Soviet testing during the moratorium, while warning that small underground tests could escape detection.
Role range: 1958-1961
Soviet Weapons Development Assessment
McCone forwarded the AEC General Advisory Committee's assessment of Soviet nuclear weapons development possibilities during the testing moratorium.
Role range: 1958-1961
1961
DCI Selection Announced
President Kennedy announced that he intended to appoint McCone to succeed Allen Dulles as Director of Central Intelligence.
Role range: 1961-1965
Intelligence Community Consultant
McCone began serving as a consultant so he could familiarize himself with CIA and the wider Intelligence Community before formally taking office.
Role range: 1961-1965
DCI Swearing-In
Chief Justice Earl Warren administered McCone's oath as Director of Central Intelligence in the White House Cabinet Room.
Role range: 1961-1965
Director of Central Intelligence
McCone was sworn in as Director of Central Intelligence and became the fourth Director of the Central Intelligence Agency.
Role range: 1961-1965
CIA Organization Working Group
McCone established a working group led by Inspector General Lyman Kirkpatrick to examine CIA organization and the case for a separate scientific directorate.
Role range: 1961-1965
1962
Scientific Directorate Announcement
McCone announced that CIA would establish a new directorate focused on research and development to strengthen technical intelligence capabilities.
Role range: 1961-1965
Intelligence Community Coordination Mandate
President Kennedy directed McCone to concentrate on coordinating the entire foreign intelligence community while delegating more detailed CIA administration.
Role range: 1961-1965
Senate Confirmation Hearing
McCone appeared before the Senate Armed Services Committee during consideration of his nomination as Director of Central Intelligence.
Role range: 1961-1965
Senate Confirmation
The United States Senate confirmed McCone as Director of Central Intelligence after debate over his appointment and the CIA oversight relationship.
Role range: 1961-1965
Deputy Directorate for Research Notice
CIA issued the headquarters notice establishing the Deputy Directorate for Research, placing important technical collection programs within the new organization.
Role range: 1961-1965
Scoville Appointed Research Deputy
McCone appointed Herbert Scoville to lead the new Deputy Directorate for Research and concentrate CIA's emerging scientific and technical work.
Role range: 1961-1965
Vietnam Assessment Visit
McCone and Richard Helms visited Saigon and reviewed counterinsurgency, intelligence reporting, and CIA programs as the American commitment in South Vietnam expanded.
Role range: 1961-1965
Laos Neutrality Intelligence Role
After the Geneva agreement on neutral Laos, McCone managed CIA responsibilities for supporting Hmong forces while seeking to keep the covert role limited.
Role range: 1961-1965
Honeymoon Departure
McCone left Washington for a honeymoon in France, leaving Deputy Director Marshall Carter to serve as Acting Director during a critical period of the Cuban buildup.
Role range: 1961-1965
Buon Enao Program Review
McCone sent Gordon Gray a memorandum reviewing the history and development of the Buon Enao counterinsurgency project in South Vietnam.
Role range: 1961-1965
Cuban Missile Crisis
McCone repeatedly warned that the Soviet buildup in Cuba might conceal plans to deploy offensive ballistic missiles.
Role range: 1961-1965
Cuban Missile Crisis
From France, McCone warned that extensive Soviet defensive preparations in Cuba could be intended to conceal the later installation of medium-range ballistic missiles.
Role range: 1961-1965
Return From European Honeymoon
McCone returned from France after sending warnings that Soviet defensive preparations in Cuba could be masking an offensive missile deployment.
Role range: 1961-1965
Cuban Missile Crisis
McCone questioned restrictions on U-2 coverage of Cuba and pressed for broader reconnaissance as evidence of the Soviet military buildup accumulated.
Role range: 1961-1965
Return for Missile Crisis
After learning that U-2 photography confirmed Soviet offensive missiles in Cuba, McCone returned to Washington and remained there through the crisis.
Role range: 1961-1965
Crisis Warning and Deadline Proposal
McCone recommended warning Moscow and Havana, demanding prompt dismantlement, and reserving a large military strike if the offensive missile deployment remained in place.
Role range: 1961-1965
Cuban Missile Crisis
McCone briefed senior officials on expanding photographic evidence and the estimated readiness of Soviet offensive missile sites in Cuba.
Role range: 1961-1965
Cuban Missile Crisis
McCone reviewed new intelligence as reconnaissance identified additional missile activity and bomber-related installations in Cuba.
Role range: 1961-1965
ExComm Military Options Review
McCone joined Kennedy and senior advisers in reviewing blockade, air-strike, invasion, diplomatic, and warning options during the first days of the missile crisis.
Role range: 1961-1965
Cuban Missile Crisis
McCone assessed the growing operational capability of the Soviet missile deployment while the administration refined its response.
Role range: 1961-1965
Quarantine Announcement Intelligence Support
McCone supplied intelligence judgments and photographic evidence supporting Kennedy's public disclosure of the Soviet missile deployment and the decision to impose a quarantine.
Role range: 1961-1965
Cuban Missile Crisis
McCone reported intelligence indicating that Soviet personnel controlled the offensive missile installations in Cuba.
Role range: 1961-1965
Cuban Missile Crisis
McCone reviewed intelligence on Soviet shipping movements and continuing activity at Cuban missile sites as the quarantine took effect.
Role range: 1961-1965
Congressional Missile Intelligence Briefing
McCone briefed congressional leaders on the missile evidence, Soviet activity in Cuba, and the intelligence basis for the administration's quarantine policy.
Role range: 1961-1965
Cuban Missile Crisis
McCone reviewed estimates showing that work continued at several missile installations while diplomatic exchanges intensified.
Role range: 1961-1965
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.