Project Blue Book Case #1516. On July 21, 1952, an unidentified object was observed at San Marcos AFB — the second Blue Book unknown from this helicopter pilot training installation (following Case #3166 from August 1954). Gary AFB's rotary-wing pilots trained at low altitude, making them exceptionally attentive to aerial objects. July 1952 was during the peak wave. The case was classified "Unknown."
Wikimedia Commons (Public domain) — United States Geological Survey (USGS)
Second Blue Book unknown at San Marcos AFB helicopter training base, Texas (1952)
UFOs/UAPsOther UFOHistorical
29.8949°N, 97.8645°W
Location
San Marcos AFB, Texas
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