★Historically significant

A sitting U.S. Senator (Richard Russell) is the primary witness in a CIA Top Secret debriefing memo concerning an unidentified aerial object observed inside Soviet territory, making this one of the most senior-witness UAP reports in the CIA's declassified holdings.

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

CIAPDFMemoTOP SECRETNo redactionsPURSUE Release 4

8/10

significant, well-sourced

UAP Insight significance score

Location: Azerbaijan
Incident date: 1955
Duration: approximately ten minutes beyond Alyaty
Witnesses: Multiple witnesses
Released: July 10, 2026

UAP Characteristics

▲ TriangleLuminousErratic movement

Evidence Types

Testimony

Official Conclusion

The evidence does not appear sufficiently firm to warrant the conclusion that the Soviets have developed and have in operation a radically new type of aircraft; observations can probably be explained as steep climbing aircraft or missiles.

Official Description

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.

Key Findings

→U.S. Senator Richard Russell, while traveling by train through Soviet territory at approximately 2010 hours, observed a small greenish-yellow glowing ball rising rapidly from beyond a nearby hill.
→Four witnesses were debriefed: Senator Russell, Mr. Efron, Mr. Gros, and Colonel Hathaway, each reporting differing perceptual details of the object(s).
→Colonel Hathaway described a shadowy object with a single light in the middle at the top and a rotating light or lights at the base resembling exhaust, and believed it did not resemble any known aircraft, rocket, or missile.
→Mr. Gros separately reported a triangular object with three lights that appeared to be ejected from a launching site.
→The CIA's Assistant Director for Scientific Intelligence, Herbert Scoville Jr., concluded the evidence does not appear sufficiently firm to warrant the conclusion that the Soviets had developed and operated a radically new type of aircraft.

UAP Insight Analysis— AI generated, not official

A CIA memorandum dated 31 October 1955, addressed to the Director of Central Intelligence, summarizing post-debriefing accounts from four witnesses — including U.S. Senator Richard Russell — who observed luminous aerial objects from a train traveling between Baku and Tiflis in the Soviet Union (present-day Azerbaijan/Georgia). The memo documents their individual descriptions of the objects and concludes that the evidence does not firmly support the existence of a radically new Soviet aircraft type, suggesting the objects were more likely steep-climbing aircraft or missiles.

Analyst Notes

The four witnesses provided differing and partially inconsistent accounts of the object(s): Senator Russell saw only a glowing ball, Mr. Efron saw two lights resembling eyes, Colonel Hathaway saw a shadowy rotating object, and Mr. Gros saw a triangular object — suggesting possible variation in perception or multiple distinct objects. No sensor data corroborates the observations. The CIA's own conclusion cautiously favors a conventional explanation (steep-climbing aircraft or missiles). The incident occurred in Soviet territory with no opportunity for follow-up investigation.

Extracted Entities

People

Senator Richard RussellColonel HathawayMr. EfronMr. GrosHerbert Scoville Jr.

Agencies & Organizations

Central Intelligence Agency (CIA)OSI (Office of Scientific Intelligence)DD/IOCIASD/SIGM/SIAD/SI

Locations

BakuTiflis (Tbilisi)Soviet Union

PDF not loading? Open directly ↗

Open PDF in new tab ↗

AI analysis by claude-sonnet-4-6 · July 20, 2026