Project Blue Book Case #1260. On June 7, 1952, another unidentified object was observed over Albuquerque — the seventh Blue Book unknown from the nuclear weapons capital, coming just two days after the sixth (Case #1256). Two unknowns in 48 hours over the nation's most sensitive nuclear complex was an extraordinary concentration that no investigator could dismiss.

Seven cases made Albuquerque the undisputed champion of Blue Book unknowns. The Kirtland-Sandia-Manzano corridor's gravitational pull on unidentified objects was one of the most documented and least explained patterns in the entire project. The case was classified "Unknown."

Seventh Blue Book unknown over Albuquerque's nuclear corridor (1952)

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Third Blue Book unknown reported over Albuquerque nuclear corridor (1951)

Luminous object observed over Albuquerque during the green fireball era (1950)

Fourth Blue Book unknown over Albuquerque's nuclear corridor (1952)

Fifth Blue Book unknown over Albuquerque's nuclear corridor (1952)

Sixth Blue Book unknown over Albuquerque's nuclear corridor (1952)

Green fireball-type object observed over Albuquerque nuclear corridor (1952)