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

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