Sperry UFO case

The Sperry UFO case was a sighting of an Unidentified Flying Object by the captain, Willis Sperry, and other crew of an American Airlines DC-6 airborne near Mount Vernon, Maryland on 29 May 1950.
Media exposure of the case helped to establish a popular perception of UFOs being reported by "credible" witnesses such as airline pilots; Sperry was interviewed for several newspapers and was later featured in Clarence Greene's 1956 semi-documentary film Unidentified Flying Objects: The true story of flying saucers.
The sighting
Sperry's aircraft had left Washington Airport at 9:10 pm EST on a flight to Nashville and was climbing to 20,000 ft. Weather conditions were clear, with the ground obscured by haze, and a full moon around 25° above the horizon. At approximately 9:30pm, seven miles west of Mount Vernon, copilot W. Gates alerted Sperry to a bright blue or bluish light ahead of them and increasing in size. In a letter to Flying magazine several months later, Sperry described the light as "a brilliant, diffused, bluish light of fluorescent type 25 times the magnitude of the brightest star". To avert a possible collision, Sperry banked the aircraft and changed course 45° to the right; the light appeared to stop before changing course to parallel the aircraft on the left.
During this period the light very briefly passed between the aircraft and the upper part of the moon, revealing an object with a long silhouette (somewhat reminiscent of a submarine) without visible wings or empennage. In his 1950 letter, Sperry stated the blue light was on the front of the object, which was also seen by the copilot and by flight engineer R. Arnholt.
The object having appeared to pass behind the left wing, the pilots banked to the left and resumed their previous course, but Gates spotted the light again through the right window "as though it had circled behind them".
Sperry reported his observations to Washington control tower, but they had observed nothing on radar. He also spoke to his passengers, stating that one man had seen an "extremely bright light passing the left side of the ship".
Later interviews
Apart from newspaper interviews immediately following the sighting, the press having been notified by control tower staff, and his appearance in the 1956 film (where the case was featured alongside the Mantell Incident, Gorman Dogfight and others considered unexplained at the time), Sperry was also interviewed by KABC-TV in 1964. He and Arnholt were further interviewed in 1968 by the prominent ufologist Dr James E. McDonald. Both he and Gates, the copilot, had however "emphatically discounted" the possibility of the phenomenon being a meteor, due to its movements.<ref name="cirvisreport"/>

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