Project Blue Book Case #1319. On June 21, 1952, an unidentified aerial object was observed over Kelly Air Force Base in San Antonio, Texas. Kelly AFB was the headquarters of the San Antonio Air Materiel Area (SAAMA), responsible for logistics and maintenance for the Air Force's vast fleet. The base also housed intelligence and technical operations that made it a sensitive installation.
Kelly AFB sat within San Antonio's extraordinary concentration of military air bases — alongside Randolph, Lackland, and Brooks — creating one of the densest clusters of military aviation facilities in the world. Personnel at Kelly were experienced aircraft observers, familiar with every type in the Air Force inventory as planes cycled through the base for maintenance and overhaul.
The June 1952 sighting predated the explosive July wave by just weeks. In retrospect, June 1952 marked the beginning of the buildup, with sighting rates climbing steadily before the July eruption. The object observed over Kelly added to a pattern of unexplained reports from military installations that was becoming impossible for Blue Book to ignore.
The object did not match any aircraft type known to personnel at the base — a significant determination given Kelly's role as a maintenance depot where observers would have seen virtually every aircraft model in service. No flight operations at Kelly or neighboring bases correlated with the sighting. Weather data did not support atmospheric explanations. The case was classified "Unknown," one of several from the San Antonio military complex during this period.