U.F.O. Investigation Report — Wilmington, Massachusetts, 29 June 1960

This document is an official U.F.O. investigation report from the 3245th Operations Group at L.G. Hanscom Field, Bedford, Massachusetts, dated 12 July 1960. The report details an incident occurring on 29 June 1960, in which a civilian witness in Wilmington, Massachusetts, reported observing an unidentified aerial object. The witness, a 38-year-old self-employed plumbing and heating contractor and former World War II 'Sea Bee,' described the object as egg-shaped, white in color, and appearing metallic as it turned. He estimated the object was at an altitude above 50,000 feet and traveling at speeds of 1,000 mph or greater. The witness observed the object for approximately five minutes before it disappeared moving skyward. The investigation was conducted by Captain Albert J. Mariconda, a rated pilot and Strike Control Officer, who interviewed the witness and verified his background. Captain Mariconda conducted extensive inquiries, including checking with the Boston Air Defense Sector for radar tracks, contacting the Boston Air Route Traffic Control Center, and consulting with the National Space Surveillance Control Center. A weather balloon released from the base was investigated as a potential explanation; however, it was determined that the balloon had burst and fallen into the ocean prior to the time of the sighting, effectively eliminating it as a cause. The report concludes that for lack of concrete evidence, the observation must be classified as an 'Unidentified Flying Object.' The investigating officer noted that the witness was a mature and intelligent individual with a good understanding of aviation, and that the subsequent appearance of two jet aircraft was likely coincidental. The document includes correspondence between various military units, including the 3245th Air Base Wing and the Air Technical Intelligence Center, and provides detailed meteorological data and flight path analysis.