1957 Torpedo-Shaped UAP Near the Shippingport Atomic Plant, Observed at About 2,000 Feet and Investigated by the Air Force and FBI

To the point

In 1957 near the Shippingport Atomic Plant, John Karcher, Lee Plunkett, and Mrs. Norderbugger with her daughter and son‑in‑law saw a 200‑foot torpedo‑shaped unidentified aerial craft at about 2,000 feet, moving slowly with green on top and a reddish‑orange bottom separated by a yellow stripe, as it headed south and then retraced its path over the plant, a sighting the Air Force and FBI took seriously, and That-Consequence6666 later suggested the color sequence might map to a wavelength range, though that is only an interpretation.

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1957 - torpedo shaped UAP circles Atomic Plant at Shippingport, USA, the top half green-coloured and the bottom half a reddish-orange, both separated by a strip of yellow - UFO FEED
ufofeed.com

1957 - torpedo shaped UAP circles Atomic Plant at Shippingport, USA, the top half green-coloured and the bottom half a reddish-orange, both separated by a strip of yellow - UFO FEED

Source: UFO Report