Twelve Red Rocks Amphitheatre employees witnessed a massive disc-shaped metallic craft with 'three levels of windows' hovering near the Colorado venue.
Anglican priest and 37 witnesses observed a hovering disc with humanoid figures who appeared to wave back when greeted, over a Papua New Guinea mission station.
V-formations of bluish-green lights observed by Texas Tech professors and photographed by a student became a classic unsolved Project Blue Book case.
Paul and Evelyn Trent photographed a metallic disc over their Oregon farm, producing the most analyzed and authenticated UFO photos in history.
The US military initially announced recovery of a 'flying disc' near Roswell, NM before retracting the statement, creating the most famous UFO controversy in history.
Private pilot Kenneth Arnold's sighting of nine unusual objects near Mount Rainier launched the modern UFO era and coined the term 'flying saucers.'