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This FBI file serial 164 in 62-HQ-83894 holds several copies of Air Intelligence Requirements Memorandum Number 4, "Unconventional Aircraft," issued 15 February 1949 by the Directorate of Intelligence, Headquarters United States Air Force. Major General C. P. Cabell signed it. It sets out continuing Air Force requirements for information on unconventional aircraft and unidentified flying objects, including "Flying Discs," and tells commands and outside agencies to send reports to the Air Materiel Command at Wright-Patterson AFB. It also lists detailed reporting questions on sightings, observers, radar data and physical evidence.
RESTRICTED 3. Local flight schedules of commerc1al, private and m1Utary aircraft flying ln viclnity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testlng devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other . 5. If object contacted earth, obtain son samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terraln where observed. c. Place where 1t contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentlons that might presum ably be construed as such). cl-!~C. P. CABELL Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRJBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelllgence, Department of State Dir ector of Intelllgence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED - 7 -
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