Third Blue Book unknown over Houston, Texas (1961)

Project Blue Book Case #7510. On July 20, 1961, a bright object was observed over Houston — the third Blue Book unknown from the city (joining Cases #1219 from 1952 and #10262 from 1966). Houston's growing aerospace significance, with NASA's Manned Spacecraft Center arriving that same year, made the city increasingly relevant to the phenomenon. The case was classified "Unknown."