"The summer 1952 UFO sighting wave was one of the largest of all time, and arguably the most significant of all time in terms of the credible reports and hardcore scientific data obtained."
Richard H. Hall(source)

The Washington DC flap was a series of UFO reported sightings over Washington DC from July 12 to July 29, 1952. The most-publicized sightings took place on consecutive weekends, July 19-20 and July 26-27.

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