On the morning of 6 April 1966 pupils and teachers at two schools in the Melbourne suburb of Westall — between two and three hundred people by various counts — watched a grey-silver disc cross the sports field, drop behind the trees by the grasslands, and lift away a few minutes later. It is the largest sighting by number of witnesses in Australian history. The pupils were assembled that day and told not to discuss it; several of them said for decades afterwards that men in uniform had come to the field. Explanations from a weather balloon to a test aircraft have been offered. In 2013 a playground shaped like a flying saucer was built in the park where it came down.

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Wright-Patterson and Hangar 18

Wright-Patterson Air Force Base near Dayton, Ohio, USA, is one of the largest research, development, and logistics installations of the United States Air Force. It gained global notoriety as the operational headquarters for Project Blue Book (1952–1969), the official U.S. military investigation into UFO phenomena, and the home of the Foreign Technology Division (FTD), responsible for analyzing adversary aerospace hardware.