🇺🇸 USAF — Project Blue Book
In February 1959, a witness in Mansfield, Ohio, observed three parallel lines in the sky cutting through clouds. Two were identified as vapor trails from a jet, but the third line had no clear explanation. The witness took photographs, including a color negative and a black and white image. Military researchers suggested the unusual lines might be shadows from cloud layers, but could not confirm this theory. The report notes that the phenomenon occurred twice, both times with objects moving in the same direction. The lack of a clear explanation sparked interest in the case.