Project Blue Book Case #2177. On October 19, 1952, another unidentified object was observed over San Antonio, Texas — the fourth Blue Book unknown from America's military aviation capital in 1952 alone (following Cases #1236, #2052, and #2521). No other American city produced as many unresolved Blue Book cases during the 1952 wave.
San Antonio's four-base complex — Lackland, Kelly, Randolph, and Brooks — made its airspace the most heavily trafficked military corridor in the country. The city's contribution of four unknowns in a single year, despite this extraordinary level of aviation activity and expertise, was one of the most striking patterns in Blue Book's statistical record.
October 1952 was in the wave's declining phase, but San Antonio continued producing cases that defied the identification capabilities of its world-class aviation community. The persistence of unknowns over this specific complex suggested either a genuine phenomenon or a systematic blind spot in military aviation identification — neither explanation was comfortable.
The case was classified "Unknown."