Project Blue Book Case #1245. On June 1, 1952 — the same date as the Rapid City, SD case — witnesses in Walla Walla, Washington, observed a bright object in the sky. Walla Walla sits in the wheat-growing country of southeastern Washington, approximately 40 miles from the Hanford nuclear reservation.
The simultaneous occurrence of unknowns at Walla Walla and Rapid City — separated by over 1,000 miles — was part of the accelerating wave pattern that Blue Book was beginning to recognize. Walla Walla's proximity to Hanford added the case to the nuclear-facility correlation. The case was classified "Unknown."