A US Department of Defense contractor’s tantalizing encounter with a giant, glowing UFO has sparked 10 years of research and two patents inspired by his encounter.

Three witnesses, including that Pentagon engineer, report that they captured electronic evidence of a ‘barbell’ UFO, half the length of a football field, that glowed an eerie ‘indigo’ blue.

The craft, they said, flew silently over an old logging road in southwestern Ontario, Canada, on August 28, 2013, near where the trio had camped for a hunting trip.

DailyMail.com spoke with the case’s first investigators, who shared electronic data from the contractor’s attempt to film the object — showing ‘white noise’ pulses in the video that recur in one-second loops identical to strobing light from the UFO itself.

‘The captured data of the event,’ the witness reported, ‘may be the first real physical proof of not just a craft flying, but that it flies by virtue of an incredibly complex and […] powerful spinning electromagnetic propulsion system.’

The case was investigated by the same nanotechnology expert whose analysis of a 2007 mass UFO sighting in Texas became a centerpiece of the Steven Spielberg-produced UFO docuseries ‘Encounters’ last year on Netflix.

‘Is there another ‘barbell’ case we’ve investigated like this?’ that engineer, UFO investigator Robert Powell, told DailyMail.com of this rare case. ‘No, it’s the only one.’

Powell told DailyMail.com that UFO cases with this shape are so rare that only about ’50 to 60 cases’ exist ‘throughout history.’

Powell, whose new book on UFOs has garnered praise from former Defense Department intelligence official Chris Mellon, personally visited the contractor’s lab and worked with him on analyzing the eerie interference on his UFO video.

‘He gave me a tour of the defense facility,’ Powell said, who vetted the source’s identity and biographical claims.

‘There was a heavy duty commercial 3D printer in the lab and there were offices with three or four engineers that worked there beside him in that his building,’ he noted.

The August 28, 2013 ‘barbell’ UFO encounter itself, these witnesses said, began at around 9:40pm as they were returning to civilization from a black bear hunting expedition, a practice that is legal when done in season in Canada.

The defense contractor witness was seated in the back of Dodge 4×4 truck, with the two other witnesses in the front seat, as reported to Powell and his co-investigator, retired former police detective Phil Leech.

‘We were roughly four-and-a-half or five miles from the main road, when I noted something over my shoulder,’ continued the defense contractor, who wishes to remain anonymous to preserve his Defense Department business contacts.

‘The very first thing that was intense was just how bright this thing was,’ he noted.

‘It was spectacular. Having been involved with optical systems in the past, we’re talking about a vehicle that looked like a stadium lighting scenario — it was brilliant.’

The witness described ‘an indigo plasma that covered most of the craft,’ which was bone-shaped or barbell-shaped and extended about 170-feet long, 60-feet wide and 20-feet tall, as it flew slowly just over the tree-line above this old logging road.

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