1. Foo fighters
The term foo fighter was used by Allied aircraft pilots in World War II to describe various UFOs or mysterious aerial phenomena seen in the skies over both the European and Pacific theaters of operations. Though "foo fighter" initially described a type of UFO reported and named by the U.S. 415th Night Fighter Squadron, the term was also commonly used to mean any UFO sighting from that period. Formally reported from November 1944 onwards, witnesses often assumed that the foo fighters were secret weapons employed by the enemy.
However, they could not be outmaneuvered or shot down. The phenomenon was so widespread that the lights earned a name – in the European Theater of Operations they were often called "Kraut fireballs", but for the most part called "foo fighters". The military took the sightings seriously, suspecting that the mysterious sightings might be secret German weapons, but further investigation revealed that German and Japanese pilots had reported similar sightings.
2. Ghost rockets
Ghost rockets were rocket- or missile-shaped unidentified flying objects sighted in 1946, mostly in Sweden and nearby countries. The first reports of ghost rockets were made on February 26, 1946, by Finnish observers. About 2,000 sightings were logged between May and December 1946, with peaks on 9 and 11 August 1946. Two hundred sightings were verified with radar returns, and authorities recovered physical fragments which were attributed to ghost rockets.
Investigations concluded that many ghost rocket sightings were probably caused by meteors. For example, the peaks of the sightings, on the 9 and 11 August 1946, also fall within the peak of the annual Perseid meteor shower. However, most ghost rocket sightings did not occur during meteor shower activity, and furthermore displayed characteristics inconsistent with meteors, such as reported maneuverability.
3. Belgian UFO wave
The Belgian UFO wave was a series of sightings of purported triangular UFOs in Belgium, which lasted from 29 November 1989 to April 1990. Months after the event, many people claimed to have witnessed the object, but no pictures, videos or any other type of proof was ever provided.
The Belgian UFO wave began in November 1989. Reports were filed, most many weeks after the events. No witnesses managed to take any photographic evidence of the event. 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.
4. Phoenix Lights
The Phoenix Lights were a series of widely sighted unidentified flying objects or UFOs observed in the skies over the U.S. states of Arizona, Nevada, and the Mexican state of Sonora on March 13, 1997.
Lights of varying descriptions were seen by thousands of people between 19:30 and 22:30 MST, in a space of about 300 miles (480 km), from the Nevada line, through Phoenix, to the edge of Tucson. There were two distinct events involved in the incident: a triangular formation of lights seen to pass over the state, and a series of stationary lights seen in the Phoenix area. The United States Air Force identified the second group of lights as flares dropped by A-10 Warthog aircraft that were on training exercises at the Barry Goldwater Range in southwest Arizona. Witnesses claim to have observed a huge carpenter's square-shaped UFO, containing five spherical lights or possibly light-emitting engines. Fife Symington, the governor at the time, was one witness to this incident; he later called the object "otherworldly."
5. 1952 Washington, D.C. UFO incident
The 1952 Washington, D.C. UFO incident was a series of unidentified flying object reports in USA from July 12 to July 29, 1952, over Washington, D.C. The most publicized sightings took place on consecutive weekends, July 19–20 and July 26–27.
,,We knew immediately that a very strange situation existed . . . their movements were completely radical compared to those of ordinary aircraft."
Barnes had two controllers check Nugent's radar; they found that it was working normally. Barnes then called National Airport's radar-equipped control tower; the controllers there, Howard Cocklin and Joe Zacko, said that they also had unidentified blips on their radar screen, and that they had seen "a bright light hovering in the sky...[it] took off, zooming away at incredible speed."
6. Kaikoura lights
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 say that they could see some little disks drop from the UFO and then disappear (they were never found). 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.
A spate of sightings followed the initial report and an Air Force Skyhawk was put on stand-by to investigate any positive sightings.
7. Japan Air Lines flight 1628 incident
Japan Air Lines flight 1628 was a UFO incident that occurred on November 17, 1986 involving a Japanese Boeing 747-200F cargo aircraft. The aircraft was en route from Paris to Narita International Airport, near Tokyo, with a cargo of Beaujolais wine. On the Reykjavík to Anchorage section of the flight, at 17:11 over eastern Alaska, the crew first witnessed two unidentified objects to their left. These abruptly rose from below and closed in to escort their aircraft. Each had two rectangular arrays of what appeared to be glowing nozzles or thrusters, though their bodies remained obscured by darkness.
8. Voronezh UFO incident
The Voronezh UFO incident was an alleged UFO sighting reported in Voronezh, Soviet Union, on September 27, 1989. The incident was allegedly witnessed by a group of children, with other members of the local community, including civil servants, claiming to have seen the craft only.
The story reported by the Telegraph Agency of the Soviet Union (TASS) claimed that a group of children had spotted a small ball in the park whilst playing (now Yuzhny Park), which quickly morphed into a disc, which landed near them. Witnesses then reported a "three-eyed alien" and a robot exiting the craft. The alien stared at a horrified onlooker, freezing them in their tracks, before departing and returning five minutes later to abduct a 16-year-old boy, using what was described as a 50 cm-long "pistol tube".
9. Finnish Air Force sighting
In Finland, on April 12, 1969 seven yellow disc or ball shaped objects were spotted above Pori Airport. Jouko Kuronen from the Finnish Defence Forces was on the airfield with his plane when he heard on his radio that the overseer of Fouga Magister planes was talking to fighter pilot Tarmo Tukeva. The overseer commanded Tukeva to go see what were those seven air balloons that floated over the airport. The overseer told to Tukeva that their height was around 1500-3000 meters. Kuronen wanted to see also those objects that the overseer was talking about. After taking off, he turned his plane to see what was above. He saw seven disc or ball shaped objects and a Fouga Magister which was approaching them. Then Kuronen's own radar spotted the objects and they were also spotted by the ground control. When Tukeva got close enough, he also could say that these objects were ball or disc shaped but he could not tell his distance to them when lacking set points.
10. Manises UFO incident
The Manises UFO incident took place on 11 November 1979, forcing a commercial flight of the Spanish company Transportes Aéreos Españoles, with 109 passengers, to make an emergency landing at the Manises' airport in Valencia, Spain, when they were flying over Ibiza. After the emergency landing, a Spanish Air Force fighter aircraft took off from Los Llanos Base in order to intercept the mysterious object.
A TAE Supercaravelle was the first aircraft involved in the incident. Flight JK-297 had taken off from Salzburg (Austria) with 109 passengers on board, and had made a refuelling stop on the island Mallorca before setting course towards Las Palmas.
In order to avoid a possible collision, the captain changed altitude. However, the lights mirrored the new course and stayed about half a kilometer away from the plane. Since the object was violating all elementary safety rules and an evasive maneuver was deemed impossible by the crew, the captain decided on going off-course and made an emergency landing in Manises' airport.