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📖 Encyclopedia History · Oct 29, 2026 · 2 min read

Battelle Memorial Institute's classified analysis of Air Force UFO reports from 1952.

📖 Encyclopedia History · Oct 29, 2026 · 3 min read

A 1949–51 Air Force effort to photograph the green fireballs over New Mexico.

📖 Encyclopedia History · Oct 29, 2026 · 4 min read

A secret Army Air Forces program using balloon trains to detect Soviet nuclear tests, blamed by the Air Force for the Roswell debris.

📖 Encyclopedia History · Oct 29, 2026 · 9 min read

The Air Force's public UFO investigation from 1952 until its closure in December 1969.

📖 Encyclopedia History · Oct 29, 2026 · 3 min read

The Air Force's skeptical UFO project of 1949–51 that replaced Project Sign.

📖 Encyclopedia History · Oct 29, 2026 · 3 min read

The Air Force's first formal UFO study (1948), whose staff reportedly favoured an interplanetary explanation.