Triangle UFO became transparent while Illinois witnesses watched

Triangle UFO became transparent while Illinois witnesses watched - National ufo | Examiner.com: "Two Illinois witnesses standing outside October 14, 2011, report watching a "triangle shaped UFO" with a humming noise and lights arranged in a V-shape just a few hundred feet away and a few hundred feet in the air, according to testimony from the Mutual UFO Network (MUFON) witness reporting database. The object appeared solid and at times transparent. "Surface of ship appeared transparent, yet solid?" the reporting stated. "Dull black or gray, but also transparent at times." The object then became "invisible" and the humming noise stopped."