Washington D.C. "Invasion" Flap (1952).
official-recordgovernment_studyProject Blue Book
The Washington D.C. 'Invasion' flap was a series of radar-visual contacts over the US Capitol on consecutive July 1952 weekends that prompted jet-interceptor scrambles and a major Project Blue Book…
The Washington D.C. 'Invasion' flap was a series of radar-visual contacts over the US Capitol on consecutive July 1952 weekends that prompted jet-interceptor scrambles and a major Project Blue Book press conference attributing the events largely to temperature-inversion radar effects. It matters as one of the most famous and politically charged UFO events, driving the CIA's Robertson Panel response.