"The Mariana UFO incident occurred in August 1950 in Great Falls, Montana. The film footage of the sighting is believed to be among the first ever taken of what came to be called an unidentified flying object. The footage was investigated by the U.S. Air Force, and found to be reflections from two F-94 jet fighters.

[...]

In July 1952, Captain Ruppelt was able to convince Mariana to let the Air Force see the film again for a more detailed analysis. Mariana reluctantly agreed, but only after requiring the Air Force to sign an agreement that they would not remove any frames of the film.[13] The film analysts at Wright-Patterson AFB concluded that the objects in Mariana's film were not "birds, balloons, or meteors".[14] The original conclusion - that the objects were reflections from the F-94 jets - was also ruled out. According to Ruppelt in his memoirs: "The two jets weren't anywhere close to where the two UFOs had been... we studied each individual light and both appeared too steady to be reflections. We drew a blank on the Montana Movie, it was an unknown"." (https://en.wikipedia.org/wiki/Mariana_UFO_incident)

"1952 - Warrant Officer D.C. Newhouse, USN, obtained 16 mm color movies of a group of UFOs which he and his wife observed visually near Tremonton, Utah. At relatively close range, UFOs appeared flat and circular "shaped like two saucers, one inverted on top of the other."

Mr. Newhouse unpacked his Bell and Howell Automaster camera, with 3-inch telephoto lens, from the trunk of his car and obtained about 1200 frames of the UFOs on Daylight Kodachrome film.

During the filming, Mr. Newhouse changed the iris stop of the camera from f/8 to f/16. The film was submitted to Navy authorities, who forwarded it to the Air Force at ATIC in Dayton, Ohio, where it was studied for several months.

According to Mr. Newhouse, frames of the movie showing a single UFO moving away over the horizon (hence providing some ranging information) were missing when the film was returned." (https://www.ufocasebook.com/tremontonutah.html)

"In July 1993, I interviewed two former INCO policemen who witnessed a daytime sighting of two flying saucers over Creighton #3 shaft on September 15, 1961." (http://noufors.com/audio_clips.html)

"April 15th, 1966, 9:45am, Catalina island. Navy photographer, Lee Hansen, captures a flying object on film with no apparent flight control surfaces or engine. On this 'clear, clear day' he describes the object as 'silver with a shadow underneath as though as metallic' and 'maybe 20 meters across'" (https://www.youtube.com/watch?v=D-Z8x2cE1yk)

"On a quiet day in March, 1966, seven eyewitnesses reported an unidentified flying object maneuvering over Livingston and Washtenaw counties.

Ordinarily, these reports might have been dismissed by officials as the work of cranks. But this time, the seven witnesses WERE officials -- police officers and sheriff's deputies from the two counties.

And their stories were backed up by more than 100 witnesses, including William Van Horn, a civil defense director, and dozens of students who watched the football-shaped object for four hours as it maneuvered near the University of Michigan campus, a nearby airport and a local swamp." (https://www.ufocasebook.com/michigan1966chase.html)

"Although the bizarre UFO incident of April 1966 began in Portage County, Ohio, it would end over the state border in Pennsylvania covering over 80 miles. Furthermore, what began with one police car with two officers pursuing an unknown, low-flying object quickly turned into multiple police cars who would join the chase at various places along the route." (https://www.ufoinsight.com/ufos/close-encounters/portage-county-ufo-chase)

"At approximately 11:00 am on Wednesday, 6 April 1966, students and a teacher from Westall High School, now Westall Secondary College, reported seeing a flying object, described as a grey (or silvery-green) saucer-shaped craft with a slight purple hue and about twice the size of a family car. According to the students, the object was descending, overflew the high school, and disappeared behind a stand of trees. Approximately 20 minutes later the object reportedly reappeared, climbed at speed and departed towards the north-west. Some accounts describe the object as being pursued by five unidentified aircraft." (https://en.wikipedia.org/wiki/Westall_UFO)

"Cigar-shaped UFOs caught on camera by Joseph Ferriere and Harold Trudel, 1967/68" (https://www.youtube.com/watch?v=oUD0glgz6KM)

"Canadian Pacific Airlines pilot interviewed by Dr. J. Allen Hynek.

Date of incident: June 1969" (https://www.youtube.com/watch?v=EbQJVzJqCdI)

"On May 23, 1971 at about 12:30 P M, one of the most convincing photographs of a UFO was taken by one Rudi Nagora, a Munich musician. Nagora, along with his wife, were vacationing near St. Lorenzen, Styria, Austria.

After finding a suitable place to park his car, Nagora left his wife inside the vehicle while he scouted the general area before the two of them ventured out.

Suddenly, he heard a "whizzing" sound coming from above.

Looking up, he could clearly see a shining, silver disc which was between him and the cloud plane." (https://www.ufocasebook.com/nagora.html)

"The incident of October 1973 over Mansfield, Ohio, was witnessed by four professional military pilots, as well as multiple witnesses on the ground. Furthermore, the encounter is still unexplained but considered one of the more authentic of such incidents. An unknown and highly advanced aircraft would zoom in on a military helicopter and then stop suddenly in front of them, hovering silently." (https://www.ufoinsight.com/ufos/close-encounters/mansfield-coyne-helicopter-ufo)

"In mid- to late-October of 1973, just days before tens of thousands of costumed kids were to hit the streets of Cincinnati and surrounding communities for Halloween night, southwest Ohio was under invasion — an invasion that seemingly came from the heavens, and police and government officials across the region were on edge." (https://www.citybeat.com/news/space-invaders--12184054)

-> https://www.citybeat.com/news/space-invaders--12184054

-> https://www.ufocasebook.com/2010/technoir2.html

-> https://www.nytimes.com/1973/10/18/archives/haldeman-sheds-crewcut-for-longer-look-notes-on-people.html

Police dispatch tapes of UFO sightings in Tilton, New Hampshire on November 8, 1974.

Voices on the tapes include officers from Tilton, Belmont and Gilford, NH: Mark E. Paine, Michael Alden, Mike McCarthy, Norman Stanley, Steven Hodges and Scott Wolf. Last part of the video is J. Oswald talking with George Prescott and dispatchers at the Tilton police department." (https://www.youtube.com/watch?v=aKs6PCIazLc)

"1975 UFO case: Sightings - Experience of Karen Klinger and Dennis Murawska" (https://www.youtube.com/watch?v=HLPOlsy4SLk)

"The apparent alien abduction of (then) 22-year-old Travis Walton in the winter of 1975 is perhaps one of the most well-known of such encounters." (https://www.ufoinsight.com/aliens/abductions/travis-walton-abduction)

"Emory Masterson CE lll Encounter at Tucumcari, NM at White Point on November 18/19, 1976

144: Lost while on a hunting trip, Masterson encounters four objects on the ground and four objects landing. Above the objects was a large object, which used light to search and communicate with the other objects and project images onto the clouds. Masterson observes these objects throughout the night. Incident reported to the Center on 12.21.1976. Investigation turned over to the Aerial Phenomena Research Organization (APRO) by Gribble. Two recordings compiled. First, Mrs. Masterson notifies the Center and Second, Gribble interviews Masterson. 55:05" (http://noufors.com/research_recordings_of_Robert_Gribble_s_national_ufo_reporting_center.html)

"The Kaikoura lights is a name given by the New Zealand media to a series of UFO sightings that occurred in December 1978, over the skies above the Kaikoura mountain ranges in the northeast of New Zealand's South Island. The first sightings were made on 21 December when the crew of a Safe Air Ltd cargo aircraft began observing a series of strange lights around their Armstrong Whitworth AW.660 Argosy aircraft, which tracked along with their aircraft for several minutes before disappearing and then reappearing elsewhere. The UFO was very large and had five white flashing lights that were visible on the craft. Some people[who?] say that they could see some little disks drop from the UFO and then disappear. The pilots described some of the lights to be the size of a house and others small but flashing brilliantly. These objects appeared on the air traffic controller radar in Wellington and also on the aircraft's on-board radar." (https://en.wikipedia.org/wiki/Kaikoura_lights)

"On November 8, 1978, Mrs. Cathy Wilfong and her sister Mrs. Cindy Bridges viewed a UFO near Greenfield,

Indiana. You could say they had very good proof that they did see something unidentified by the large imprint, about 140 feet long, that was left in their soybean field in the back of their home." (https://dailydialectics.com/space/MUFON/MUFON%20UFO%20Journal%20-%201979%2012.%20December.pdf)

"Digging into the archives, WLKY presents a story from 1978 when people in Bloomfield, Indiana said they were seeing UFOs on a regular basis." (https://www.youtube.com/watch?v=ratGRj2DKLg)

"The Hudson Valley UFO account is composed of not one, but many sightings, all similar, and all pointing to one conclusion. There was something "unexplained" going on in this place only an hour's drive north of New York City. The Hudson Valley UFO saga began at almost the beginning of a new year, 1982.

Just a short time before midnight, December 31, 1981, a retired policeman was sitting in his backyard in Kent, N. Y. He saw a group of strange lights to the south.

The lights were a brilliant red, green, and white, and at first, he thought they could be coming from an airplane in trouble. It was common for him to sit and watch the big jets fly over at night. As the lights became closer, his opinion quickly changed. The lights were moving too slowly to be a plane, and now... they were too low, and there was no noise from an engine. What was the strange craft he was seeing?

As the lights came closer, he could hear a humming sound, and now he could see that the lights were arranged in a triangular shape, and there was a solid object of some kind connecting the lights.

No, this was no aircraft he had ever seen before! The solid part looked like...a fuselage. That's what it was...a fuselage. He was looking at a UFO.

This type of report would be repeated many times in the Hudson Valley over the next few years. All of them were similar, a V-shaped row of lights connected by a solid object of some type. Literally hundreds of witnesses would see this same sight. There was definitely something unusual going on in the skies over the Hudson Valley. Something that moved ever so slowly, so silently." (https://www.ufocasebook.com/Hudsonvalley.html)

"Charles I. Halt (born 1939) is a retired United States Air Force colonel and a former deputy base commander of RAF Bentwaters, near Woodbridge, Suffolk.

[...]

In the late hours of December 27, and early December 28, 1980 then Lieutenant Colonel Halt led a patrol to investigate an alleged UFO landing site near the eastern edge of Rendlesham Forest. During this investigation they witnessed several unidentified lights [...]" (https://en.wikipedia.org/wiki/Charles_I._Halt)

"The Gulf Breeze UFO incident was a series of claimed UFO sightings in Gulf Breeze, Florida, during 1987 and 1988. Beginning in November 1987, The Gulf Breeze Sentinel published a number of photos supplied to them by local contractor Ed Walters that were claimed to show a UFO. UFOlogists such as Bruce Maccabee believed the photographs were genuine; however, others strongly suspected them to be a hoax. Pensacola News Journal reporter Craig Myers investigated Walters' claims a few years later, criticizing the Sentinel's coverage of the story as "uncritical" and "sensationalist". In 1990, after Walters and his family moved, the new owners of Walters' house discovered a styrofoam model UFO hidden in the attic. Myers was able to duplicate the object in the Walters photographs almost exactly using the model UFO found in the attic. Walters later claimed that the model UFO had been "planted" in the attic." (https://en.wikipedia.org/wiki/Gulf_Breeze_UFO_incident)

This video takes a look at the evidence and story to assess the viability and credibility of the claims and images -

"Revisiting The Gulf Breeze UFO Sightings || A YouTube Documentary": https://www.youtube.com/watch?v=pJzLKIqp-3w

"On Friday, Feb. 11, 1989, the first call was made to the Fyffe Police Department. A woman reported seeing a strange object in the sky. By the end of Feb. 12, more than 50 residents had reported seeing the strange objects, including the town’s police chief and his assistant.

The object was described by a witness as hovering “at an angle from 1 o’clock to 7 o'clock with bright lights at the top and bottom. The curvature was outlined in green with "a real bright light in the center.”

Fyffe Police Chief Charles “Junior” Garmany and Assistant Police Chief Fred Works responded to the initial call and soon saw something in the sky." (https://www.al.com/living/2014/02/25_years_ago_ufo_hunters_desce.html)

"The Belgian UFO wave was a series of sightings of triangular UFOs in Belgium, which lasted from 29 November 1989 to April 1990.

[...]

The Belgian UFO wave began in November 1989. Reports were filed, most many weeks after the events. Many of the reports related a large object flying at low altitude. Some reports also stated that the craft was of a flat, triangular shape, with lights underneath.[1]

The Belgian UFO wave peaked with the events of the night of 30–31 March 1990. On that night, one unknown object was tracked on radar, and two Belgian Air Force F-16s were sent to investigate, with neither pilot reporting seeing the object. No reports were received from the public on the date. But over the next 2 weeks reports from 143 people who claimed to have witnessed the object were received, all of them after the event. Over the ensuing months, many others claimed to have witnessed these events as well.[2]" (https://en.wikipedia.org/wiki/Belgian_UFO_wave)

"On August 24, 1990, many independent witnesses observed formations of luminous spheres in the sky near the city of Greifswald, located close to the coast of the Baltic Sea. Many eyewitness reports backed up by videos and photographs make this case one of the best documented sightings in Europe.

Although the degree of strangeness in this case is not very high, no scientific explanation has been found to date. Some skeptics have tried to reduce the characteristics of this phenomenon to known one. But, so far, no one has successfully explained all the data observed and documented. The skeptics seem to be satisfied with any possible explanation. But from a scientific point of view a possibility is only the starting point for gathering evidence and the search for confirmation. In the ”Greifswald case” no convincing explanations for any hypothesis could be found.

Many sightings of what appeared to be groups of luminous spheres were reported in the early days of of August 1990 from the coast of the Baltic Sea between the cities of Rostock, Greifswald and the Isle of Ruegen and Usedom. These lights displayed unusual behavior contrary to airplanes, balloons, luminous ammunition and atmospherical phenomena. The movements of these lights appeared inconsistent with known objects, their acceleration seemed too rapid and abrupt." (http://archiv.mufon-ces.org/text/english/greifswald.htm)

Two American military veterans share their stories about seeing Triangular UFOs.

"2 seperate witness footages of a bizarre upright oblong or rectangle pod UFO fixed in positive lift over the ocean observed and filmed from Gulf Breeze, Florida USA on September 5th 1993." (https://www.youtube.com/watch?v=W9XSJqFFBTU)

"Nighttime UFO video from UFO Hotspot Gulf Breeze, FL - August 04, 1993" (https://www.youtube.com/watch?v=fwOmZ8VQK4g)

"Evidence points to March 13, 1997 as the onset of this extremely compelling account of various and sundry phenomenal lights which moved over the state of Arizona. These lights, though referred to as the "Phoenix Lights," were actually witnessed in at least five other cities.

Phoenix has the distinction as the first Arizona city to report the unknown light sources, which were initially spotted over Superstition Mountains, east of the city, at about 7:30 PM. The first reports indicated an object of six points of light, immediately followed by a report of eight connected lights, with a separate ninth, which moved in unison with the eight.

The formation was seen again over the Gila River just before 10:00 PM. In a matter of minutes, the enormous, lighted structure had made its way over the southern part of the city of Phoenix. At this time, literally thousands of people witnessed the object or objects. It was at this time, that the first photographs and videos were taken.

The final sightings of the night were in Rainbow Valley. Witnesses there reported a very distinct "V" formation. This sighting occurred at about 2:00 AM on March 14." (https://www.ufocasebook.com/phoenixlights.html)

"07-04-1998 Genuine Footage of a Flying Saucer UFO Recorded Over Weymouth, Dorset, UK

[...]

This video was shot in Weymouth, Dorset, England on 07/04/1998 and has now been stabilized and restored, (on behalf of BEAMS - The British Earth and Aerial Mysteries Society), because the original version was so shaky; originally, it was difficult to even see the object properly, but this stabilization has now helped to improve its viewability." (https://www.youtube.com/watch?v=t3LUiLwNbdQ)

"On September 6, 1999, a lady by the name of Sandy called to report that she saw a silver ball-shaped object that shrunk in size and quickly moved away in the sky! The sighting took place in August 1998." (http://noufors.com/audio_clips.html)

"Retired Navy Commander Describes His Sighting In 2004" (https://www.youtube.com/watch?v=ZA-h3dIeD_A) ; another video on David Fravor's sighting.

"Faster than a speeding bullet — and bigger than a Wal-Mart.

That's how residents near the west Texas town of Stephenville described an object they spotted in the sky one night last week.

Dozens of people — including a pilot and a police officer — said a UFO hovered over the farming community for about five minutes last Tuesday before streaking away into the night sky.

Pilot Steve Allen saw the object when he was out clearing brush off a hilltop near the town of Selden. Allen described the unidentified object as being an enormous aircraft with flashing strobe lights — and it was totally silent.

He said the UFO sped away at more than 3,000 mph, followed by two fighter jets that were hopelessly outmaneuvered. Allen said it took the aircraft just a few seconds to cross a section of sky that it takes him 20 minutes to fly in his Cessna.

The veteran pilot said the UFO, an estimated half-mile wide and a mile long, was "bigger than a Wal-Mart."" (https://www.npr.org/2008/01/16/18146244/dozens-claim-they-spotted-ufo-in-texas)

"Nov 14, 2009

[...] filmed north of Catalina Islands, CA over the ocean sky. Looks like Plasma Aurora Borealis type streaks as they both go one direction, pause then the other (veritcal, horizontal ) then fade away. The noise is our wind generator on our saliboat which was at anchor." (https://www.youtube.com/watch?v=8EL53SBaSlY)

"Video footage of a Strange UFO from Bloomington, Indiana was sent into Brian Vike a few years back. The footage is copyright to Mark Evans." (https://www.youtube.com/watch?v=CTIyTJWv5ps)

Videos of former US Navy pilot Ryan Graves discussing his experiences with UFOs.

Commercial airline pilot observes and records a cube-shaped UFO fly past his aircraft.

"This brightly lit object was filmed over the mocca district in sao paulo brazil 8-8-2021 the witness quickly pulled his car over and managed to film this incredible footage of what looks to be a mothership releasing scout ships. what do you think these are. the original source is a youtube channel named diego santos."