Case File 051 · Open — site acknowledged, activity classified
Area 51
1955–present · Groom Lake, Lincoln County, Nevada · 37.2°N 115.8°W
- Documents
- 5
- Images
- 0
- Videos
- 1
- Witnesses
- 5
Overview
On 12 April 1955 a small aircraft carrying a Lockheed test pilot, the CIA officer running the U-2 programme and his Air Force liaison flew over southern Nevada looking for somewhere to test an aeroplane that could not be seen. They found a dry lake bed on the north-eastern edge of the Atomic Energy Commission’s Nevada Proving Ground — flat enough to land on, remote enough that nobody would drive past, and already inside restricted airspace that nobody would query. Construction began within weeks. The first U-2 flew from it on 4 August 1955.
For the next four decades the United States government maintained that the place did not exist. That is not a figure of speech. When former employees sued over hazardous waste burned in open trenches, the Air Force declined to confirm the existence of the facility they had worked at, and in September 1995 the President signed a memorandum exempting it from environmental disclosure law. That memorandum names Groom Lake, Nevada, in the Federal Register. It is the document in which the denial officially ended, and almost nobody has read it.
Eighteen years later the CIA released a history of the U-2 and OXCART programmes with the site references restored, and the name Area 51 appeared in a government publication for the first time. The press treated it as a revelation about aliens. It was a revelation about aeroplanes, and about how long a bureaucracy will hold a position it has already lost.
This dossier separates three things that are routinely blended: what the site is documented to have done, what has been claimed about it without documentation, and what remains genuinely unknown because the declassification clock has not yet run. The third category is real and it is large — but it is a different thing from the second, and the distance between them is the whole subject.
Timeline
12 April 1955
The survey flight finds Groom Lake
Lockheed test pilot Tony LeVier, Skunk Works chief Clarence "Kelly" Johnson, CIA project director Richard M. Bissell Jr. and Air Force liaison Col. Osmond Ritland surveyed dry lake beds in southern Nevada from the air. They selected Groom Lake, adjacent to the Nevada Proving Ground. Bissell had reviewed some fifty candidate sites beforehand.
Late April 1955
The site is named Paradise Ranch
Johnson proposed the name to CIA officials in Washington and it was accepted. It was a recruiting device: engineers were being asked to move to a construction camp in the desert. The workforce shortened it to "the Ranch".
4 August 1955
First U-2 flight
LeVier made the first official flight test of the U-2 from the new airfield. The aircraft was designed to overfly the Soviet Union above 70,000 feet, at a period when airliners cruised near 20,000.
1955–1960
U-2 testing and the sightings it produced
The CIA’s own programme history records that high-altitude U-2 flights produced a marked rise in unidentified-object reports, and that Air Force investigators checking those reports had no access to the flight schedules and could not resolve them.
26 April 1962
First A-12 flight
Lockheed test pilot Louis Schalk flew the CIA’s A-12 from Groom Lake on an unannounced first flight; the official first flight followed on 30 April. The aircraft was designed for sustained flight above Mach 3 and remains, with its Air Force successor the SR-71, the fastest air-breathing aircraft operated.
23 January – 8 April 1968
HAVE DOUGHNUT
A MiG-21F-13 obtained from Israel, following an Iraqi pilot’s 1966 defection, was flight-tested at the site. The resulting tactical evaluation ran to some 310 pages and fed directly into US air combat training.
17 February 1969
HAVE DRILL and HAVE FERRY
Two MiG-17s were evaluated at the site under the same arrangement. The HAVE DRILL aircraft flew 172 sorties over 55 days. In the earliest engagements no US Navy pilot won his first fight against it — a result that contributed to the founding of the Navy Fighter Weapons School the same year.
11 April 1974
The Skylab photograph
A memorandum from the deputy director of the National Reconnaissance Office records that Skylab astronauts had photographed the site despite instructions not to, and sets out the argument over whether the frame could be released. It was, eventually, filed into NASA’s public Skylab collection, where nobody noticed it.
1 December 1977
Have Blue flies
Test pilot Bill Park flew the first Have Blue demonstrator from the site. It was the proof-of-concept for the F-117, and the reason the site’s night flying tempo increased through the late 1970s and 1980s.
August 1984
The Air Force concedes it had no authority
At a House Interior subcommittee hearing on legislation to withdraw the Groom Mountain range, an Air Force official acknowledged that the service had already closed the land to the public — denying access for water, mining and hunting — without legal authority to do so.
October 1984
Congress withdraws 89,600 acres
Public Law 98-485 withdrew the Groom Mountain range from public access, retroactively legitimising the closure and removing the ridgelines from which the airfield could be seen from the north.
1994
The workers sue
Former and serving employees, among them the widows Helen Frost and Stella Kasza, brought citizen suits under the Resource Conservation and Recovery Act — Frost v. Perry against the Air Force and Kasza v. Browner against the EPA — alleging that hazardous waste had been burned in open trenches and that no inventory had been kept.
7 April 1995
The last viewpoints close
Public Land Order 7131 withdrew 3,972.04 acres of public land, including Freedom Ridge and White Sides Mountain, the two hills from which the airfield could still be seen. The order describes the purpose as a safety and security buffer for the Nellis Range and does not name Groom Lake.
29 September 1995
The denial ends on paper
Presidential Determination 95-45 exempted "the United States Air Force's operating location near Groom Lake, Nevada" from any disclosure requirement under solid and hazardous waste law, citing the two lawsuits by name. Published in the Federal Register on 10 October 1995, it is the first government document to place the site on the public record. The exemption has been renewed annually since.
January 1998
State secrets closes the case
The Ninth Circuit upheld the government in Kasza v. Browner, holding that the military and state secrets privilege covered the discovery the plaintiffs needed. The Supreme Court declined to review it later that year. The workers never learned what they had been exposed to.
15 August 2013
The CIA history is published unredacted
The National Security Archive posted the Pedlow and Welzenbach history of the U-2 and OXCART programmes, released in June 2013 in response to a request the Archive had filed in 2005. The 1998 version had been heavily redacted; this one restored the site references and a map, and used the name Area 51.
16 September 2015
Groom Mine is condemned
The Justice Department took the Sheahan family’s 400-acre mining property, held since 1885 and enclosed by the range, by eminent domain after the family declined the Air Force’s offer. The valuation dispute that followed ran for years, with the government’s appraisal and the family’s two orders of magnitude apart.
20 September 2019
"Storm Area 51"
A joke Facebook event with roughly two million responses produced, on the day, an estimated 1,500 people at gatherings in Rachel and Hiko, of whom about 150 reached the gates. There were seven arrests. Nobody entered the base.
Key people
Richard M. Bissell Jr.
CIA special assistant to the Director; head of the U-2 programme
Ran the AQUATONE programme and chose the site. His decision to place a CIA flight test operation inside AEC restricted airspace is the origin of both the facility and the secrecy regime around it.
Clarence "Kelly" Johnson
Chief engineer, Lockheed Skunk Works
Designed the U-2 and the A-12 and named the site Paradise Ranch. The two aircraft between them account for most of the site’s documented first two decades.
Tony LeVier
Lockheed test pilot
Flew the April 1955 survey that found the lake bed and made the first U-2 flight from it in August. One of the few people whose account of the site’s origin is corroborated by the CIA’s own history.
Jonathan Turley
Counsel for the plaintiff workers
Brought Frost v. Perry and Kasza v. Browner in 1994 and litigated them to the Supreme Court. His cases forced the only formal government statement about the site made in the twentieth century — the presidential exemption issued to defeat them.
Jeffrey T. Richelson
Senior fellow, National Security Archive
Filed the 2005 request that produced the unredacted CIA history in 2013, and edited the two document collections that remain the best-organised primary material on the site.
Robert Lazar
Claimant
Appeared on KLAS-TV in Las Vegas in 1989 saying he had worked on recovered craft at a site south of Groom Lake he called S-4. His account is the origin of nearly all modern popular belief about the base, and is examined separately in this file.
Evidence
Each item carries a status. Where something is contested or has been debunked, it says so.
The CIA history of the U-2 and OXCART programmes
VerifiedDocument
Written by agency historians Gregory Pedlow and Donald Welzenbach and completed in 1992; published in heavily redacted form in 1998 and released substantially unredacted in June 2013. It is the founding primary source for the site: how it was chosen, what was flown there, and the agency’s own account of the UFO reports the flights generated. Roughly 400 pages, dry, and freely downloadable from the CIA reading room.
Presidential Determination 95-45 of 29 September 1995
VerifiedDocument
A memorandum to the EPA Administrator and the Secretary of the Air Force exempting "the Air Force's operating location near Groom Lake, Nevada" from any waste-disposal requirement that would compel disclosure of classified information, citing Kasza v. Browner and Frost v. Perry by docket number. It is the single most consequential document in the file: an official acknowledgement of the site, issued for the purpose of continuing to conceal it, and published in the Federal Register where anyone could read it.
Public Land Order 7131, effective 7 April 1995
VerifiedDocument
A Bureau of Land Management order withdrawing 3,972.04 acres of public land — the ground including Freedom Ridge and White Sides Mountain — from surface entry, mining and mineral leasing. It gives the purpose as a safety and security buffer for the Nellis Air Force Range and never mentions Groom Lake. The effect was to remove the last public vantage points over the airfield.
The Skylab photograph and the 1974 NRO memoranda
VerifiedDocument
Two memoranda, of 11 and 19 April 1974, recording that Skylab astronauts had photographed the installation against instructions and debating whether the frame could be released. They document the security regime around the site from the inside, and they document that it lost: the photograph went into NASA’s public collection.
The MiG exploitation reports — HAVE DOUGHNUT, HAVE DRILL, HAVE FERRY
VerifiedDocument
Declassified tactical evaluations of a MiG-21 and two MiG-17s flown at the site in 1968 and 1969. They explain, without anything exotic, why Soviet fighters were operating over Nevada, and they are the clearest documented case of the site doing something genuinely surprising for entirely conventional reasons.
Project Blue Book case files
VerifiedDocument
The Air Force’s UFO investigation files, held by the National Archives: 12,618 reported sightings between 1947 and 1969, of which 701 remain listed as unidentified. They are the material against which the CIA’s claim about U-2 flights can be tested, and they are open to anyone.
The claim that U-2 flights account for over half of UFO reports
ContestedClaim
The CIA history states that U-2 and later OXCART flights accounted for more than half of all UFO reports in the late 1950s and most of the 1960s. The figure appears to rest on the recollection of programme officials rather than on any published audit of the Blue Book files against flight schedules. It has been rejected by sceptics and proponents alike — Robert Sheaffer, who has spent decades deflating UFO claims, calls it nonsense, and argues the reports do not match the flights in time or place. The mechanism is real; the proportion is unevidenced.
Robert Lazar’s account of S-4
ContestedTestimony
The claim that recovered craft were reverse-engineered at a site south of Groom Lake, given to KLAS-TV in 1989. No document, photograph or object supporting it has entered the public record in thirty-seven years, and no colleague has come forward to place him there. Lazar states that his employment records were removed, which is unfalsifiable rather than false. One checkable element supports him: he appears in an early-1980s Los Alamos National Laboratory telephone directory, which establishes presence at a national laboratory but says nothing about role.
Robert Lazar’s stated MIT and Caltech degrees
DebunkedCredential
Neither institution holds a record of his attendance, and no transcript, diploma or contemporaneous documentation has been produced in thirty-seven years. This is the one part of the account that could have been settled trivially in his favour and was not.
The official position that the facility did not exist
DebunkedClaim
Maintained in federal litigation against people who had worked at the site, and abandoned by the government’s own hand: the September 1995 presidential exemption names Groom Lake in the Federal Register, and the 2013 CIA release names Area 51 and prints a map. The denial is now documented to have been false while it was being made, which is a rarer thing than it sounds and is the strongest evidence in this file of institutional dishonesty about the site.
Witness accounts
LeVier described the April 1955 survey — flying dry lake beds in an unmarked light aircraft until Groom Lake was spotted — and the state of the place when flying began four months later: a construction camp with a hangar, a strip and very little else. His account is corroborated in outline by the CIA’s own programme history.
Barnes tracked and analysed A-12 flights. He was unable to describe the work at all until the CIA declassified the OXCART programme in September 2007, and has since spoken publicly and organised an oral history so that colleagues could record what they did. His stated motive is that a generation of workers were going to die without ever being allowed to say what their careers had consisted of.
Her suit alleged that hazardous waste was burned in open trenches at the site and that her husband, who worked there, died of a liver condition associated with the resulting exposure. Reporting on the case describes findings of dioxins and dibenzofurans in his tissue. The state secrets privilege prevented the case from reaching the evidence that would have tested the allegation.
Her husband approached lawyers in 1994 to find out what he had been exposed to, and died of cancer before the litigation concluded. She pursued the case to the Supreme Court, which declined to hear it in 1998. No inventory of what was burned has ever been produced to the plaintiffs or to the public.
Interviewed in silhouette as "Dennis" by the reporter George Knapp on KLAS-TV in Las Vegas in May 1989, and by name that November, Lazar said he had been employed to work on the propulsion of recovered craft at a site he called S-4, south of Groom Lake, and described a stable isotope of element 115 as the fuel. His account has been substantially consistent since, and substantially unevidenced since.
The argument
Both sides, given equal room. The alternative explanations are not an afterthought.
Supporting the claim
The government’s dishonesty about the site is documented, not inferred
This is the strongest point available and it does not depend on anything exotic. The United States denied the existence of a facility in federal court, against former employees who were dying, and when that position came under pressure the President signed a memorandum to keep it going. Whatever else is true, an institution willing to do that has forfeited any presumption that what it has said about the place is complete.
The declassification clock means the recent decades are genuinely blank
The U-2 took forty-three years to reach a published history and fifty-eight to reach an unredacted one. OXCART took forty-five. On that schedule, nothing flown at the site after about 1985 is yet due, and the absence of documentation about the 1990s and 2000s is exactly what a functioning secrecy system produces. Treating that silence as evidence of nothing would be a mistake in the other direction.
The acknowledged programmes were stranger than the dismissals of the time
In 1963 an informed sceptic would have been right to say there was no aircraft flying at 90,000 feet at three times the speed of sound, built of titanium bought from the Soviet Union through front companies, leaking fuel on the ground because its panels were fitted loose to allow for expansion. Every part of that was true. The record of this site is that reality repeatedly outran what the available evidence licensed.
One checkable element of the Lazar account holds
He appears in a Los Alamos telephone directory from the early 1980s and was described as working there in a contemporaneous local newspaper piece. That is a long way short of the claim, but it distinguishes him from a person with no connection to the world he described, and the case against him is not improved by pretending otherwise.
Alternative explanations
Every decade has a documented programme that accounts for the site
U-2 development from 1955; OXCART from 1962; Have Blue and the F-117 from 1977; acquired Soviet aircraft through the late 1960s and beyond. There is no period in the site’s history where the acknowledged activity fails to justify a facility of that size, remoteness and secrecy. This does not prove nothing else was there. It removes the argument that something unexplained must have been.
The sightings have a documented mechanism
A silver aircraft at 70,000 feet is still in direct sunlight after sunset at ground level, and reflects it downward to observers standing in the dark — no engine noise, no navigation lights, apparently motionless. Air Force investigators receiving those reports were not cleared for the programme and could not resolve them. This is not speculation; the CIA wrote it down. The contested part is how many reports it covers, not whether it happened.
The secrecy is about tempo, not content
Acknowledging a flight test range means acknowledging that things are tested there, and when. Activity rates are themselves intelligence, which is why the denial persisted long after the site was visible from orbit, photographed by Soviet satellites and marked on commercial maps. On this reading the extreme secrecy is a routine property of test ranges rather than a signal about what is inside.
A recovered-craft programme would leave the trail these programmes left
The strongest sceptical argument is about paper. OXCART was compartmented to a few hundred people and still generated contracts, appropriations, clearance rosters, courier logs and thousands of retirees, and it was reconstructable in detail forty-five years later. A programme to reverse-engineer non-human technology would generate more of all of it, not less. Nothing of the kind has surfaced from any of the mechanisms — request, leak, misfiling, litigation, congressional inquiry — that surfaced everything else in this file.
The Lazar account fails on the parts that could be checked
Of his claims, the ones open to verification are the degrees and the fuel. The degrees have no institutional record. Element 115 was synthesised after he described it, which sounds like a hit until the properties are compared: the isotopes produced are intensely radioactive and decay in fractions of a second, the opposite of the stability his account requires. A prediction that is right about the number and wrong about everything that mattered is not corroboration.
Video
Interviews and documentary material relating to this case.
Contemporary news coverage of the August 2013 release of the U-2 and OXCART history.
Latest developments
15 Aug 2013
The name appears in a government document
The unredacted CIA history was posted by the National Security Archive, restoring references to Groom Lake and Area 51 and including a map. It was reported worldwide as a disclosure about UFOs; it is a disclosure about reconnaissance aircraft, and it says so on almost every page.
16 Sept 2015
The last private land inside the perimeter is taken
Groom Mine, held by the Sheahan family since 1885, was condemned by the Justice Department. The subsequent valuation dispute set the government’s appraisal of roughly $333,000 against the family’s expert range of $44 million to $116 million.
20 Sept 2019
Two million people say they will storm it; about 150 turn up at the gate
The internet joke that reached the perimeter. It is worth recording because it marks the point at which the site’s cultural meaning fully detached from its documented history — and because the gate held, quietly, as it always has.
What we could not settle
Loose ends we are still working on.
- 01
Why is it called Area 51?
The universal explanation is that the number came from the Atomic Energy Commission’s grid of numbered areas at the Nevada Test Site. But the site is not part of the Test Site’s own numbering, and the Test Site’s guide records that early area numbers were assigned without a set pattern. The CIA history does not settle it. This is a small question that nobody has answered from a primary record.
- 02
How many Blue Book cases were actually U-2 or A-12 flights?
The Blue Book files are open at the National Archives and the flight schedules are now largely declassified. Cross-referencing them would convert the CIA’s "more than half" from a recollection into a number. Nobody has published that work, which is why the claim has been arguable for thirty years.
- 03
What was flown at the site in the 1980s and 1990s?
On the forty-to-fifty-year pattern set by the U-2, OXCART and Have Blue, this material is entering the release window now. It is a question with an answer arriving on a schedule, which distinguishes it from most questions asked about the site.
- 04
What were the workers exposed to?
No inventory of what was burned has ever been produced, to the plaintiffs or to anyone. The Ninth Circuit’s ruling means the medical question was closed without being examined rather than answered. No independent toxicological study of the workforce has been published.
- 05
When did Robert Frost die, and of what precisely?
Secondary reporting gives 1988 and 1990, and describes the cause in general terms. We have not been able to establish either from a primary record, and we are not going to state a date we cannot support in a file that turns on the difference.
- 06
How many people work there?
No figure has been published by any administration. The only public proxy is the contractor-operated fleet flying daily from a dedicated terminal at Las Vegas under the call sign JANET, whose aircraft are registered and countable and whose passengers are not.
Got something to add?
A question, a source we missed, a correction, or something you saw yourself — all of it is welcome here. You do not need to be an expert, and you are allowed to disagree with us.
Nobody has yet — go on.
Sources
Sources
Open them and check for yourself. Where a record is public, it is linked.
The Central Intelligence Agency and Overhead Reconnaissance: The U-2 and OXCART Programs, 1954–1974
Gregory W. Pedlow and Donald E. Welzenbach; CIA FOIA Electronic Reading Room · 25 Jun 2013
The Secret History of the U-2 — and Area 51 (Electronic Briefing Book 434)
National Security Archive, edited by Jeffrey T. Richelson · 15 Aug 2013
The Area 51 File: Secret Aircraft and Soviet MiGs
National Security Archive, edited by Jeffrey T. Richelson · 29 Oct 2013
Federal Register, vol. 60, no. 195, p. 52823 · 29 Sept 1995
Public Land Order 7131: Withdrawal of Public Land to the United States Air Force; Nevada
Bureau of Land Management; Federal Register, vol. 60, no. 68, p. 18030 · 10 Apr 1995
Project BLUE BOOK — Unidentified Flying Objects
US National Archives and Records Administration
High court won’t review "state secrets" privilege in Area 51 case
The Reporters Committee for Freedom of the Press · 30 Nov 1998
Kasza v. Browner, 133 F.3d 1159 (9th Cir. 1998)
United States Court of Appeals for the Ninth Circuit · 8 Jan 1998 · no public copy located
Roadrunners Internationale — the Area 51 U-2 and OXCART alumni association
Roadrunners Internationale
See also
Everything this piece touches
Programme
Project Blue Book
US Air Force study of unidentified aerial objects, 1952–1969.
Topic
NARA
The US National Archives, which holds much of the primary record.
Topic
CREST
The CIA’s public declassified records collection, where the psi programme archive sits.
Topic
Area 51
US Air Force facility in southern Nevada, acknowledged publicly in 2013.
Other case files
Case File 018MKULTRA
1953–73 · United States and Canada
Twenty years of CIA research into drugs, hypnosis and behavioural control. The records were destroyed in 1973; what survives does so by a filing error, and it is enough.
0 documents · 0 images · 0 videos
Case File 017The Patterson–Gimlin film
1967 · Bluff Creek, northern California
Fifty-nine seconds of 16mm film shot on 20 October 1967. Two hoax claimants, one missing camera original, and a reel surfaced in 2026 that nobody outside the production has examined.
13 documents · 0 images · 1 videos
Case File 009Rendlesham Forest
1980 · Suffolk, England
December 1980, Suffolk. Three nights, two airbases, and a memorandum that has been argued over ever since. Britain’s most examined case.
0 documents · 1 images · 2 videos
Case File 031Nimitz Tic Tac
2004 · Pacific Ocean
November 2004, off the coast of Baja California. Radar, FLIR and aircrew accounts from the USS Nimitz carrier strike group, assembled in one place.
0 documents · 0 images · 4 videos
Case File 024Roswell
1947 · New Mexico
July 1947, Lincoln County, New Mexico. The recovery that produced two official explanations, decades of testimony and one of the most heavily documented disputes in the field.
0 documents · 1 images · 1 videos
0 comments