Project 10073 Record Card — Mira Loma, California, 9 April 1955

This document is an Air Intelligence Information Report regarding a sighting of an Unidentified Aerial Phenomenon (UAP) that occurred on 9 April 1955, near Mira Loma, California. The report, filed under Project 10073, details the observation of a single object by a civilian witness employed at the Exchange Lemon Produce Company. The witness described the object as round, appearing the size of a silver dollar, and white with a reddish tint. The object was observed for approximately 50 minutes, during which it emitted no noise, had no visible vapor trail or exhaust, and drifted to the south. The sighting was investigated by the 4602d Air Intelligence Service Squadron (AISS). The investigation involved checking with local weather stations and reviewing weather data. The investigators determined that the object was a weather balloon that had been released from Edwards Air Force Base (ETCE 5503) at 090402Z April 1955. The report concludes that the sighting was caused by this weather balloon, noting that the wind conditions at the time were consistent with the balloon's drift path and the witness's description. The report was prepared by 1st Lt. Calvin Hammond Jr. and approved by Colonel John L. Wheeler Jr. of the 4602d AISS.