Incident #152 Sighting Report — Indianapolis, Indiana, 31 July 1948

This document details the investigation of a UAP sighting that occurred on July 31, 1948, in Indianapolis, Indiana. The report, filed by the 331st Air Force Base Unit, describes an observation made by a local electrician and his wife at 0825 hours. The witnesses reported seeing a single, cymbal-shaped object with a smooth, lusterless white surface. The object was estimated to be 20 feet in diameter and 6 to 8 feet high, maintaining a level flight path toward the east at an altitude of 2,000 feet and an estimated speed of 1,800 MPH. The witnesses reported that the object shimmered in the sun, creating the appearance of spinning, but produced no sound or exhaust trails. The investigation was conducted by 1st Lt. Russell J. Carey Jr., who interviewed the primary witness. The report notes that the witness was initially observing from an open bathroom window before moving to the kitchen to show his wife. The Air Materiel Command's official opinion stated that while the object could conceivably be the same as one reported in Incident 151 just two days prior, the evidence remained widely divergent, and no satisfactory conclusion could be reached. The investigator remarked that the similarities between the two incidents were significant enough that it would be a strain on coincidence to consider them entirely independent. The document includes a diagram of the object, which indicates a 3:1 ratio of length to width. The report is classified as part of the Project Grudge series and includes an index of other incidents evaluated by Dr. Hynek, categorizing this event as one where the evidence offered suggests no explanation.