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Document Editor's Pick

CIA-UAP-D020, Memorandum on Unconventional Aircraft Sightings, 1955

CIA
Released July 10, 2026
Azerbaijan
Source: War.gov

Summary

This memorandum summarizes a Central Intelligence Agency (CIA) debriefing of a group of four individuals who reported observing a “flying saucer” or “unconventional aircraft” in 1955. The group, which included U.S. Senator Richard Russell, a U.S. military service member, and two U.S. Government officials, reported observing a luminescent “greenish-yellow” phenomenon, as seen from aboard a train while traveling within the Soviet Union, in present-day Azerbaijan, between Baku and Tiflis (Tbilisi, Georgia). The document concludes by stating that the observation can “probably be explained as steep climbing aircraft or missiles,” and that “the evidence does not appear sufficiently firm to warrant the conclusion that the Soviets have developed […] a radically new type of aircraft.” The document “CIA-UAP-D021” contains a contemporary analysis of the incident.

Source & Provenance

AgencyCIA
Filename260710-O-D0360-1137
Editor's PickStrong Official Provenance

A 1955 CIA memo on unconventional aircraft sightings — useful for understanding how intelligence channels treated unexplained aerial reports during the Cold War.

— Disclosure Drop Editors

Public Grading Prompt

"How should a mid-century CIA memo be graded when it captures how intelligence channels described and routed unconventional aircraft reports, but offers no definitive conclusions?"

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