Places and programs

The secret Nevada test base that became the world's most famous alien-technology rumour.

Area 51 is a United States Air Force facility at Groom Lake in the Nevada desert, used since the 1950s to develop and test classified aircraft, including the U-2, the SR-71 Blackbird and stealth planes. Its extreme secrecy, restricted airspace and remote setting made it a magnet for speculation, and the sight of genuinely strange aircraft overhead fed the rumours.

Its alien reputation rests mainly on Bob Lazar, who claimed in 1989 to have worked on recovered flying discs at a site called S-4 nearby. The CIA formally acknowledged the base's existence in 2013 in declassified U-2 documents. A 2019 internet joke to 'storm Area 51' drew millions of responses and thousands of visitors to the gate.

The record Everything publicly documented about the base points to advanced but terrestrial aircraft. The secret programmes there explain many local sightings; the alien-technology claim rests on unverified testimony.

A Utah ranch reputed for UFOs, cattle mutilations and paranormal events, now a TV subject.

Skinwalker Ranch is a property in the Uinta Basin of Utah with a long reputation for strange phenomena: reported UFOs, unexplained lights, cattle mutilations, and creatures drawn from local Ute folklore about the shape-shifting 'skinwalker'. The Ute name is the source of the ranch's title.

In the 1990s the aerospace entrepreneur Robert Bigelow bought the ranch and funded a study of it, later connected to the Pentagon's AAWSAP programme. It was sold in 2016 and, since 2020, has been the setting of the History Channel series The Secret of Skinwalker Ranch, which has made it one of the most-searched paranormal locations in the world.

The record No phenomenon at the ranch has been independently verified under controlled conditions. Investigators point to misidentification, the power of expectation on a property primed for the strange, and the incentives of a television production.

The Ohio air base rumoured to store recovered craft and bodies in a legendary hangar.

Wright-Patterson Air Force Base near Dayton, Ohio, is a real and historically central military facility: it housed the Air Force's UFO investigations, Projects Sign, Grudge and Blue Book, and it is where the Roswell debris was reportedly shipped in 1947. That connection made it the home of 'Hangar 18', the rumoured storehouse of crashed saucers and alien bodies.

The hangar of the legend has never been shown to exist. The base's genuine role in analysing UFO reports, and in reverse-engineering foreign aircraft, is well documented; the rest is a story that grew around a place that really did handle the files.

The record The base's documented function was investigating reports and foreign technology. No recovered extraterrestrial craft or remains have ever been shown to be stored there; AARO's 2024 review found no evidence of any such holdings anywhere.

A rumoured secret joint human-alien underground base in New Mexico, with no evidence it exists.

The Dulce Base is an alleged deep underground facility beneath Archuleta Mesa near the small town of Dulce, New Mexico, said in conspiracy literature to be a joint operation of the US government and Reptilian or Grey aliens, complete with genetic laboratories and a supposed 1979 'firefight' between humans and aliens. The story spread in the 1980s through the claims of Paul Bennewitz and the writer Bill Cooper.

No evidence has ever been produced that the base exists. It is one of the most elaborate structures in UFO folklore and has no support in the physical record.

The record There is no evidence of any underground base at Dulce. The story is generally traced to a disinformation campaign and to the imaginative literature of the 1980s conspiracy scene.

The US Air Force's public UFO investigation, and the origin of much of the record.

Project Blue Book was the longest-running of the US Air Force's official UFO studies, active from 1952 to 1969 and preceded by Projects Sign (1948) and Grudge (1949). It collected and analysed 12,618 reports, of which 701 were left 'unidentified'. Its scientific consultant was the astronomer J. Allen Hynek.

Blue Book closed after the Condon Report of 1968 concluded that further study was unlikely to advance science. Its files are now declassified and searchable, and they remain the largest official archive of UFO cases in the world. A 2019 television drama took its name.

The record Blue Book resolved roughly 95 percent of its cases as aircraft, balloons, astronomical objects and hoaxes. Critics note the unexplained residue and argue the project's later purpose was reassurance as much as investigation.

The modern Pentagon UAP efforts that reopened official study after 2017.

After Blue Book closed, official study went quiet until the 2000s. The Advanced Aerospace Weapon System Applications Program (AAWSAP) and the related Advanced Aerospace Threat Identification Program (AATIP), funded from 2007 at the request of Senator Harry Reid, studied military encounters; their existence became public in the 2017 New York Times story that released the Navy videos.

In 2022 the Pentagon created the All-domain Anomaly Resolution Office (AARO) as a permanent unit to collect and resolve UAP reports. Its 2021 preliminary assessment could explain only one of 144 incidents, and its 2024 historical review found no evidence of recovered extraterrestrial technology.

The record The modern programmes confirm that some military UAP are genuinely unresolved, and just as firmly that no case has been shown to involve non-human craft. Both halves are the official position.