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Over eastern Alaska, a Japanese cargo plane has a terrifying mid-air encounter with unidentified craft.

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The incident sparks a federal investigation and secret involvement by the CIA.

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He says this event never happened and we were never here.

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In Melbourne, Australia, an extraordinary event shatters the lives of a quiet suburban community.

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I would say that what I'd seen was an extraterrestrial craft.

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The mass sighting ignites panic and accusations of a government cover-up.

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And a string of inexplicable sightings in a remote Peruvian town are captured on camera.

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The rare video evidence shows mysterious lights that mesmerize locals.

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The incident sparks off a groundbreaking government-backed investigation.

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Does anyone know what these phenomena are?

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And do the governments of the world know more than they ever reveal to us?

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The answers may lie in the fascinating stories of UFO conspiracies.

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November 17th, 1986.

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35,000 feet over eastern Alaska.

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Japan Airlines Flight 1628 is being flown by Captain Kenjū Terauchi and co-pilot Takenori Temufuji.

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The two men are approaching the final leg of a journey that will end here.

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In the late 1980s, Tokyo's Narita Airport is one of the main gateways for imports into Japan,

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helping to feed the country's growing demand for luxury foreign goods.

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Flight 1628 is among them, carrying a consignment of expensive French wines from Paris.

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For Terauchi, a veteran pilot of almost 30 years, it's a routine trip.

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So the two men are relaxed as they make their way towards their fuel stop in Anchorage.

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Then, just after 5 p.m., the pilots become aware of two lights in the darkness ahead.

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Fearing that they are on a collision course, Temufuji calls air-trapped control in nearby Anchorage.

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The following audio is recorded live as the dramatic events unfold.

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The craft aren't being picked up by ground radar. According to air-trapped control, the JAL crew is up there alone.

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The controller tries to get more detail from the pilots about what they see.

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Anchorage calls nearby Elmendorf Air Force Base to ask if they have any military craft in the area.

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The answer comes back as negative.

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And things are about to get even stranger for the crew.

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After 12 minutes, the two craft suddenly move off to the left, drawing the captain's attention to something on his port side.

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He sees a faint strip of white light illuminating an object at least 10 times the size of the 747.

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It's unlike any conventional aircraft.

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But remarkably, moments later, the sighting is backed up by news from the ground.

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Anchorage's attention to the aircraft is back to normal.

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As the situation in the air becomes increasingly tense, Anchorage advises the crew to take evasive action.

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They start a full 360-degree turn and momentarily lose track of the lights.

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But then, part of the way through the maneuver, the captain is shocked by what he finds.

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In the words of Captain Terra Uchi, there it was, as if it was waiting for me.

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Still being tailed and low on fuel, Terra Uchi requests a direct flight path to Anchorage to land.

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A nearby passenger jet is rerouted by air traffic control to see if it can confirm the crew's visuals.

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But it sees nothing in the skies around the JAL flight.

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25 minutes later, the plane touches down, ending the crew's terrifying ordeal.

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Whatever was up there made a prohibited incursion into the Japan Airlines airspace that night, breaking international aviation rules.

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And since the object remains unidentified, the pilots are taken off to be interviewed by an official from the Federal Aviation Administration.

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The captain sketches a striking picture of what he saw.

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A vast walnut-shaped craft which dwarfs the Boeing 747.

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Despite the accounts of the pilots and the radar readings that seem to show a second object in the air, the case is dropped.

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The FAA doesn't pursue it any further at this stage.

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Back in the pilot's home country, it's a different story.

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Tales of encounters with unidentified craft go back hundreds of years in Japan.

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This drawing depicts a folk story from as far back as 1803, in which a mysterious hollow craft was said to have washed ashore in eastern Japan.

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Inside the craft were strange symbols and a woman who was unable to communicate with locals.

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Since then, many more unexplained sightings have been recorded in Japan.

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So when Japanese journalists hear of the JAL encounter, they run with the story.

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Before long, it's picked up by American newspapers too.

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And soon, Alaska's branch of the FAA is inundated with questions.

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In the FAA's Washington, D.C. headquarters, John Callahan heads up the Accidents, Evaluations and Investigations Division.

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In January 1987, he receives an urgent call from Anchorage.

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They said they had a problem. They didn't know how to handle it.

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That there was media running all over the hall. So he wanted me to tell them what to do about it.

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Callahan requests that the evidence is sent to him immediately.

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The recordings allow him to see and hear exactly what happened that night at Anchorage's Air Traffic Control Center.

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The official tapes no longer exist, but this video that Callahan filmed of their playback does.

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The footage clearly identifies JAL Flight 1628 on the radar screen, and over five miles away, a distinct second object.

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Convinced the evidence shows a real target in close proximity to the Japanese airplane,

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Callahan alerts his boss.

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The Admiral calls me and says, alright, I set up a meeting tomorrow morning in the round room.

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You're going to have the CIA and the FBI, and he says there will be three scientists from Reagan's scientific study team.

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Together they watch the video, and when they're done, a CIA agent demands that he hands over the evidence.

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He says alright, this, he's pointing to the screen. This event never happened, and we were never here.

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But that doesn't kill the story. Over the coming months, reputations will be called into question and accusations of a whitewash ensue.

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The Japanese Air Force

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1986, a Japanese airline sees strange craft in the sky over Alaska.

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Now the FAA steps in to investigate. They interview Captain Teruuchi a second time.

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He remains adamant that what he saw was an alien craft.

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One theory suggests he may have been confused by an airborne natural phenomenon.

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One plausible explanation that has been suggested for the Japanese airline sighting might involve ice crystals.

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Ice crystals are found in the upper parts of our atmosphere in the area say above 20,000 feet.

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This high up, it's too cold for water to exist in its liquid form, so clouds of ice crystals form instead.

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These clouds can cause strange optical effects.

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Depending on the orientation of these billions of tiny little hexagonal ice crystals, as light is passing through that, they can create a strange optical image that could be mistaken for something else.

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And on that night, in the skies over Alaska, conditions are perfect for ice crystal formation.

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It was in November in which you would have cold enough temperatures so that the upper part of the atmosphere would definitely be ice crystals.

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Leslie Kane is an investigative reporter who has written extensively about pilot sightings of UFOs.

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She disputes the view that the JAL pilots were confused by natural phenomena.

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Pilots know how to differentiate from all the things that could be mistaken for a UFO in the sky such as a weather balloon, a blimp, some kind of lightning or natural phenomenon.

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And when they see something very unusual, you can trust what they're saying.

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But even if ice crystals could explain the sighting, that still leaves unresolved the mystery of the second object picked up by ground-based radar.

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In the wake of the CIA's involvement, the FAA releases the results of its investigation in March 1987.

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The report concludes that the whole incident was caused by nothing more than a technical glitch, born from the two different operating systems used by air traffic controllers.

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The first, primary radar, works by bouncing pulses of radio waves off objects, creating an echo.

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Secondary radar relies on the use of a device known as a transponder, which when triggered by a radar signal, relays information back to the ground about a plane's identity and location.

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On the night in question, the controllers were using both types of radar.

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JAL 1628 is identifiable from the data sent back by its transponder.

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The second target, with no data, would suggest that it's a craft with no transponder.

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And coupled with the pilot sightings, that's what the controllers believed that night.

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But the FAA report concludes instead that it's actually what's known as a split radar image.

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This is caused when a faulty transponder sends back a delayed response, which is mistaken for a second plane.

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Former FAA division manager John Callahan doesn't think the findings of his old organization stand up.

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It wasn't a ghost target because mainly the pilot cannot see ghosts.

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And when he looked out the window, he told you what he was looking at.

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There's a big round ball with white lights running around it, and there's the size of two or three aircraft carriers.

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Leslie Kane agrees that the investigation ignores crucial evidence.

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It was very disappointing. They basically dismissed the radar as being some kind of defect.

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So that was sort of the end of the FAA's work.

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It's claimed that not long after the incident, Captain Terah Uchi was transferred to a desk job and has never spoken about it since.

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The FAA has refused to reopen the case, despite repeated requests to do so by UFO investigators.

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And the CIA's involvement, described by John Callahan, has never been publicly revealed.

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Whether it was a question of pilot error, technical irregularities, or something else entirely, the story of JAL Flight 1628 continues to mystify to this day.

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Melbourne, Australia, 1966

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On April 6th, it's a bright autumn morning in the city's southern suburb of Westall.

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At Westall High School, many pupils are outside enjoying a break from their studies.

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Among them, 13-year-old Jackie Argent.

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All of a sudden, play is disrupted when a strange object emerges over the school.

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Over 50 years on, Jackie, now a retired government advisor, returns to the school to relive the events of that extraordinary day.

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The object was a disk, a, would appear to me to be a large, silvery disk in the sky.

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And we saw the disk come over, and everybody in the school, everybody that was out on the oval, actually was pointing out to the sky, looking at the disk.

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Writer and teacher Shane Ryan has been investigating this story since 2005.

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He's pieced together the events that follow from the testimony of over 50 eyewitnesses.

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It was morning recess, and so the word rushed around the school very quickly, like a bushfire, that something was happening.

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Before long, a crowd is gathered, utterly transfixed by what they're seeing.

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We watched the way it moved, which was amazing. It was capable of standing still and moving very, very fast.

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Many students still speak of the incident, but there's only a small handful of teachers from Westall High who are willing to go on record to discuss what happened that day.

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One of those is Claude Miller.

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It was recess, and I was a bit late going out to do my eye duty, and when I went outside, bingo.

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A colleague, science teacher Andrew Greenwood, comes tearing down the hall.

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I met Andrew coming in, and his first words were, did you see it? Did I see what?

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And he told me what he saw, or what he thought he saw, but he said it was up there, moving at incredible speeds.

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And now, it's not the only thing up there.

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Several light aircraft are engaging with it in what appears to be a frantic game of cat and mouse.

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They were flying around it at some distance away, but it would just leave them for dead.

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It would just suddenly whoosh and take off.

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Then, after moving over to an area of pine trees known as the Grange, it descends, seemingly to land.

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By now, it's not only at Westall High that the strange object is seen, but also in other parts of Westall.

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After a few minutes, astounded onlookers see the UFO rise again, before it turns onto its side and disappears as fast as it arrived.

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The whole school was in turmoil, but it was the turmoil of kids excited that they'd seen something and it broke the monotony.

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After the craft is left, the number of people claiming to have seen it rises quickly.

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Eventually, the number reaches into the hundreds.

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It is one of the largest mass witness daylight UFO sightings in the world.

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We're talking about around 400 people.

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For Shane Ryan, the large number of witnesses is clear evidence that something strange really was seen in the sky that day.

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But for psychologist Dr. Susan Clancy, it's more likely to be a symptom of a phenomenon known as the bandwagon effect.

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A great example of what some people call the bandwagon effect or group panic, etc. took place in New York City in 1938.

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H.G. Wells wrote a book called War of the Worlds, in which aliens crash landed in a cylinder and they were all reptilian and they were drooling and scary.

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But it was adapted for a radio show in 1938 and played in the New York area and it incited widespread panic.

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I can see the things body now, it's large, it's large as a bear.

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It's just like wet leather, but it's a face.

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Ladies and gentlemen, it's indescribable, I can hardly force myself to keep looking at it.

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People thought it was real. They tuned in late, they didn't understand it was a radio adaptation.

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And then what happened is the police department became flooded with calls of people saying that they saw the cylinder outside or they saw strange creatures.

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People believe that it's real and then they start seeing what they think they expect to see.

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So, can the Westlhawg UFO incident be explained as a case of mass delusion? Not so, according to Shane Ryan.

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It's really hard to imagine that something like mass hysteria could have been responsible for an incident like this when not only did we have an object in the sky that looked real, looked metallic,

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but when people went down to the Grange where the object was seen to descend, there was physical evidence to be found.

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The evidence is discovered when curious locals go to take a look for themselves.

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One of the first on the scene is engineering student Kevin Hurley.

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My uncle rang me up about four o'clock to say, hey, guess what? The kids have seen a UFO at the school and I go, wow!

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And then he told me that the UFO landed. So I thought, jeez, I better get down there and have a look at this.

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After hearing the news, he head straight to the Grange to see what he can find.

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Almost 50 years later, he returns to the site that had such a profound effect on him as a young man.

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The area we walked through was knee-high grass. It wasn't the scrubby stuff like this. And it was quite thick.

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The grass was flattened around, flattened down like this. Right?

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And it was flattened down in a circular area as if something had gone down and twisted on the ground a little bit to flatten the grass around in this circular fashion.

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And as news of the sighting spreads beyond Westl, a new compelling piece of evidence emerges, adding a fresh layer of intrigue to the story.

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On April 12th, a newspaper publishes a photo taken in another Melbourne suburb just four days before the Westl sighting.

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The picture seems to show a strange object hovering low in the sky.

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Much like the Westl UFO, it appears to be a disk-like craft made from silvery metallic material.

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Could the two sightings be linked?

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Back in Westl, Kevin Hurley's curiosity grows. He returns to the Grange for another look.

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Upon arrival, he quickly realizes he's not the only one who's interested in the site. The area is now guarded by men in military uniform.

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This very aggressive chap appeared. He was either Army or Air Force, I'm not sure what, and said,

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Go away! Don't come here! He was extremely aggressive.

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Before he retreats, Kevin Hurley manages to catch a glimpse of what's happening beyond the guards.

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There were a number of men also in these Army or Air Force uniforms going around the paddock,

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analyzing the ground with what looked like some sort of a Geigerkirch device.

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Since the UFO sighting, Westl seems a world away from the ordinary suburb it once was.

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And the next chain of events is about to rock its residents to the core.

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The

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1966, a school in the suburbs of Melbourne, Australia, has become the focus of a mass UFO sighting.

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The reported landing site is said to be crawling with military personnel,

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but pupils and staff at Westl High remain in the dark about what's going on.

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One of those left frustrated by the lack of answers is Claude Miller.

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I think we were expecting in the school that someone would come in, there would be explanations.

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And as the days went by, there were no explanations.

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Absolutely none.

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Unknown men in dark suits are seen visiting parts of Westall in the days that follow.

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But they don't seem to be there to provide answers.

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One afternoon, Jackie Argens is pulled out of class and interrogated by two men.

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It's an unsettling experience that's lived with her to this day.

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They ran through the whole event.

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It was like, where were you? Who were you with?

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What did you see? Just fired questions at me constantly.

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It was a boom, boom, boom questioning and my responses had to be instant.

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And then at the end, he just said to me, and I suppose you saw little green men.

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And that's when I just lost it and said, stuff you ran out, outside, burst into tears and went home.

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Jackie Argens doesn't know the identity of the men, but she has a strong suspicion of who they were working for.

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I came to the conclusion that they were Australian Secret Service Investigation Organization.

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As people try to make sense of what's happened, various theories begin to emerge.

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Some suggest the unexplained craft was nothing more than a weather balloon.

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For weather expert Professor Randy Servenny, these devices are nothing unusual.

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So the National Weather Services around the world launch weather balloons twice a day,

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and these balloons are meant to measure the weather at different levels of our atmosphere.

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But to most people, the unfamiliar shape of these large helium balloons can be surprising.

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And so they've become one of the most common causes of mistaken UFO identification.

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In April 1966, the Bureau of Meteorology releases a statement.

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A weather balloon was released from nearby Leverton Air Force Base at 8.30 a.m. on the morning of the sighting.

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But for meteorologist Dr. Karen Casiba, who's seen her fair share of weather balloons being deployed, the theory just doesn't add up.

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Usually when people are launching weather balloons, really they're trying to get it to go up through the atmosphere and not go sideways through the atmosphere.

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It's possible things could go wrong or they had some sort of different objective, but mostly weather balloons go up.

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The weather balloon theory also fails to explain why light aircraft would have been buzzing the object.

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The aircraft are one of the most mysterious elements of the Westall UFO story.

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After the sighting, the Department of Civil Aviation states there have been no reports of strange aerial encounters in the area.

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If the planes weren't commercial, then that leaves an intriguing alternative. They were military.

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Peter Merlin is an aerospace historian who specializes in military aviation.

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He thinks the UFO may have been what's known as a target drogue.

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Target drogue is a lightweight aerial target that's towed behind an airplane.

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The drogue is dragged at a safe distance from the towing plane on a long cable and used for target practice by pursuing aircraft.

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It's possible that if there was a training operation, you might have several aircraft flying along near it and it would look like they were pursuing this unusual object.

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So it might look pretty strange in the sky to a witness.

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If so, then what of the reported landing behind the Grange?

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And why would the military wish to keep the public away?

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Many questions remain unanswered for the residents of Westall.

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And as the days go by, more unknown figures appear in the town.

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A week later, Andrew Greenwood, the only teacher at Westall High to report having seen the UFO, is paid a visit at his home by two men.

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He thought they were coming around to take down more details about what he had seen.

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But in fact they were coming around to say, Andrew, we don't want you talking about this anymore.

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There are no such things as flying saucers and we don't want you saying that you've seen something like this.

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No government agency has ever admitted to trying to silence Andrew Greenwood.

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But the idea that there may have been an active attempt to hide the truth received some support from a separate incident involving Kevin Hurley.

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A few days after he was forced away from the suspected landing site, he returns to the Grange for another look.

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When he gets there, the military men have left and the site has altered dramatically.

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Though I walked through to where the circles were, that whole area was burnt.

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Whatever evidence there was of whatever had happened, it had clearly been destroyed.

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If the rumors are true and the military was sent in to cover up evidence of what happened on April 6th, what were they trying to hide?

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One theory is that it was some kind of experimental aircraft.

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Military organizations across the world have long experimented with revolutionary designs.

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These forward-thinking craft often look nothing like conventional aircraft and would therefore go unrecognized by casual observers.

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I myself have observed numerous different types of military and experimental aircraft and even I've seen things that I didn't recognize in the sky immediately.

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It's a theory that West will witness Jackie Argent was once open to.

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If you'd have asked me up until about 25 years ago, I would have said that it was an experimental craft.

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But over time, her opinion has changed.

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If you asked me today what it was that I'd seen all those years ago, I would say to you that what I'd seen was an extraterrestrial craft.

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We still don't have anything today that can move the same way that that one did.

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Despite such certainty from those who were there, psychologist Dr. Susan Clancy is still unconvinced.

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There's some culturally available script that exists.

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We've been reading about it, we've been seeing it in newspapers, even small children know what flying saucers and aliens supposedly look like.

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We don't necessarily believe it, but we think it's possible and then we see something in the sky.

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In unidentified flying object, it doesn't mean it's extraterrestrial and the explanations we often fall to are these culturally available scripts.

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The truth of what was seen that day might never be known.

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The Australian government has never admitted to carrying out any kind of investigation in the wake of the West's siding.

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In terms of finding official government documentation about this incident, even after all these years of looking,

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we've still drawn a blank.

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As long as they remain silent, the West's mystery is likely to remain just that.

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Chilucanus Peru, 2001.

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This remote town nestles in the foothills of the Andes.

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Its inhabitants, like so many in this region of South America, are deeply religious, with strong links to the spiritual world.

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On October 13, 2001, Chilucanus is filled with the sights and sounds of a festival being held in honor of a local patron saint.

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At around 9 p.m., the procession is working its way through the town.

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Among the onlookers is local photographer Yvonne Eza.

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It is the last day of the festival in Chilucanus, the city of Peruvian history.

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The festival is held in honor of a local patron saint.

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The procession is working its way through the town.

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Among the almookers is local photographer Ivan Iza.

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All of a sudden, progress halts as strange lights appear in the sky beyond the edge of town.

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Ivan turns his camera away from the festivities and up towards the floating lights.

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The camera's settings make the lights appear white,

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but they are described by those who see them as intense orange-red spheres.

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They hover silently above nearby Cerro Pelan, a hill that overlooks the town.

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Some witnesses claim that the lights actually approached the town, causing panic among the almookers.

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Today, Ivan recalls the tense scenes of that night.

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At that moment, the lights came closer to us, and people who were beside us said,

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here they come, here they come, here they come, and some ran away.

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But Ivan doesn't run.

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For over 20 minutes, he remains at the scene recording this strange phenomenon.

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12 days later, Ivan responds again to reports of strange lights over Chulucanus.

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From the top of a nearby hill, he films a single, tear-drop-shaped light hovering over the town.

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He's joined by a friend who sees it as well.

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It's incredible, hard to believe. It's like the thing we saw over Chulucanus.

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For about 20 minutes, the two men film the light, which reminds them of those previously seen over the area.

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Ivan is convinced he's captured something remarkable on video, but he's unable to explain what that is.

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To help him, he turns to a newly formed government department.

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The Office of Investigation of Anomalous Aerial Phenomena.

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It's established in 2001 by the Peruvian Air Force to examine reports of UFOs encroaching into the country's airspace.

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Ivan's call is answered by head of operations, Commander Julio Chamorro.

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I was ready to leave the office, and the phone call came in.

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It was somebody who told us they had video of a UFO.

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Chamorro dispatches field investigator Dr. Anthony Choi to do some digging.

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When Choi arrives in Chulucanus, his first priority is to review the evidence.

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Once he locates the rare tapes, he finally gets to see what he's come all this way for.

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When I saw these videos for the first time, I thought, wow, what is this?

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But my initial surprise had to give way to a more objective point of view.

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Over the coming days, Choi interviews many witnesses and visits the sites where the UFOs were seen.

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As he does so, he hears strange stories that make him realize the case goes way deeper than he ever imagined.

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Dr. Anthony Choi is in Chulucanus, Peru.

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As he looks for answers about strange lights in the sky, the story unfolds in deeply unexpected ways.

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Once in Chulucanus, when I began the investigation, I found many surprises.

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Witnesses said this phenomenon was not new, but very old.

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In fact, they remember seeing lights when they were kids.

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When I dug deeper into the investigation, I understood this phenomenon was even older.

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Sightings of unexplained lights here date back decades, and it turns out their roots are even older than that.

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To understand, Choi needs to look into the town's distant past.

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The indigenous people of Chulucanus descend from ancient pre-Inca and Inca societies,

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who fervently believed that gods and spirits inhabited their everyday lives.

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Those beliefs have changed over time, but they have not disappeared.

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Local writer Carlos Espinosa Leon has spent years gathering the stories handed down by generations of Chulucanus.

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They believe in legends, for example, that they used to see fantastical characters and little spirits.

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Choi discovers that many of their beliefs are rooted in the very hills over which the UFOs were seen.

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Most intriguing of all is Cerro Pilan, the hill over which the first lights appeared in October.

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There are a number of stories about the Pilan hill, that it's a haunted hill,

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and there you can hear the goats bleating, the herders screaming who have been bewitched.

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It's a hill that's highly respected. Peasants used to avoid passing it so that they weren't haunted.

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The respect held for Cerro Pilan goes beyond a simple fear of what it hides.

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It's thought to be one of four guardian mountains, responsible for protecting the town and capable of fighting other nearby hills in order to do so.

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Some peasants say that it's like a war of lightning bolts. The hills throw bolts at each other, trying to capture the rain for their own land, for their people, for their own areas.

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One of the most perplexing aspects of the Chulucana story are the reports that the lights approached the town, frightening onlookers.

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Psychologist Dr. Susan Clancy thinks the local belief that the hills are actually alive could have influenced that sighting.

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In a very religious country, when they're prone to want to see religious phenomena, they're dying to see religious phenomena.

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So it's like a lens where they're looking for stuff to happen, and it does.

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But while religious fervor may explain what the people of Chulucanas think they saw, it doesn't explain what was actually filmed by Ivan Iza on those nights.

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One theory is that the lights were caused by man-made aircraft.

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Having analyzed the videos, aeronautics expert David Higgins believes that search helicopters may have been responsible.

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I've looked at the footage of this particular sighting, and indeed you can see lights in the sky.

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Depending on the role of the helicopter, they may have a very bright search light that might be used in the role of search and rescue, or police, or military.

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And these lights are extremely bright, and to the onlooker on the ground who's never seen one before, it would certainly be quite a shock factor if this light suddenly came on.

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With no other existing evidence, there's only one way to work out if this theory holds weight, to analyze the videos themselves.

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Image forensics expert Michael Hartzhorn runs a series of tests.

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This footage showed a cluster of lights apparently in the sky. The first thing I wanted to do was increase the contrast as much as possible.

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And once I'd done that, I began to see a dark shape consistent with maybe a range of mountains.

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And although it's very, very vague, I definitely get the impression that these lights are on the top of a mountain range.

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If Michael Hartzhorn is correct, then the lights aren't hovering in the air. They're coming from something on the mountain itself.

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He carries out the same contrast enhancement on the second Chulukanas video, with equally revealing results.

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After enhancement, you can clearly see that that single mountain has a larger mountain behind it, and a larger mountain behind that.

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And it's actually part of a very big mountain range. And so the light that was apparently floating above the first mountain was probably on the fourth mountain behind it.

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With doubt cast over the sightings, it might seem that the Chulukanas UFO story is a simple case of mistaken identity.

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But the mystery doesn't end there.

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On November 15, 2001, 21 days after the second sighting, Yvonne is called to the center of town.

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There, a crowd of people is transfixed by another glowing object in the night sky.

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Here we are in Chulukanas, witnessing another UFO.

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Could this be just another case of a ground-based light being confused for something else?

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Hartzhorn runs tests to find out.

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I enhanced the street lamp as much as I could to see if you could see a reflection of the light in the side of that lamp.

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Because if we could have seen a reflection in there, then it would have proved that it was very close to the viewer, and it would have been a very small item then, rather than a large item in the background.

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I wasn't able to find anything in the street lamp.

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Having assessed that the glowing object is some distance away from the onlookers, Hartzhorn ups the enhancement even further.

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Once I've made this enhanced feel, I can see that the light is still in the background.

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Having assessed that the glowing object is some distance away from the onlookers, Hartzhorn ups the enhancement even further.

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Once I've made this enhanced video, I can see a diamond shape or certainly a shape behind the light, and it moves with the light and is consistent with the light being on an object.

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Image forensics alone can't prove what was up there, but the video suggests that whatever Yvonne captured on film was some kind of airborne, light-emitting object.

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Anthony Choi is unable to explain what's causing the Chulukhanis lights, so the official report that he eventually files is inconclusive.

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And when he appears on television afterwards, his Air Force boss, Colonel Rafa Maloche, is forced to admit that they don't know what's behind the sightings.

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For the moment, we can't venture to say because any explanation that comes from an unfinished investigation might result in false conclusions.

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More than ten years on, the case remains un-evolved.

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And for the people of Chulukhanis, the story has become another installment in a rich history of strange happenings.