4 Aug 1990 Sightings
Two men photographed a large diamond-shaped object with a jet nearby near Calvine in the Scottish Highlands. The Daily Record passed the pictures to the Ministry of Defence, which kept them. A surviving print held by a retired RAF press officer was made public by researcher David Clarke in 2022.
29 Nov 1989 Sightings
Gendarme patrols near Eupen reported large, silent triangular objects with bright lights, starting months of similar reports across Belgium. On the night of 30-31 March 1990 the Belgian Air Force scrambled two F-16s after a radar contact; the pilots saw nothing and the object was never identified.
7 Nov 2006 Sightings
United Airlines employees reported a dark, disc-shaped object hovering over gate C17 at O'Hare before shooting up through the clouds. The FAA said radar showed nothing unusual and suggested a weather phenomenon. The Chicago Tribune broke the story in January 2007.
8 Jan 2008 Sightings
Several dozen people around Stephenville, including a county constable, reported a large, quiet, low object with shifting lights, some saying jets chased it. The Air Force Reserve's 301st Fighter Wing first said none of its planes were there, then said 10 F-16s had been training in the area.