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. The case's first investigators ... 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.' UFO investigator Robert ... Powell told DailyMail.com that UFO cases with this shape are so rare that only about '50 to 60 cases' exist 'throughout history.' [One] 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. 'The craft rotated slowly around its center while emitting an electrical-spark-like shower, always opposite of the direction of travel,' [said the witness].