🇺🇸 USAF — Project Blue Book
In April 1961, a witness in Derry, Massachusetts, observed a luminous object traveling east to west. They described an intense blue light resembling an argon gas flame. The object maintained a parallel course to the horizon before suddenly deviating and disappearing. Although initially considered a meteor, its unusual behavior raised questions. The detailed description, including relative size and trajectory, was recorded in an official report.