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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.
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RESTRICTED 3. Local flight schedules of commercial, private and m.111tary aircraft flying In vicinity at the time. (Check Canadian activity 1f close to that border.) 4. Possible r eleases of testing devices 1n vicinity sent aloft by Ordnance, Navy, Air For ce, Army, Weather Units, Research Organizations or any other. 6. If object contacted earth, obt ain son samples within and without depr ession or spot where object landed (and then presumably departed) for purpose of ma.king comparison of soils. 6. 11 object came sufficiently near other aircraft or known objects check s urfaces 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 t errain wher e observed. c. Place wher e it contacted earth (1.f this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence wher e possible. 10. Was any radio antenna to be observed, Le., (any pr ojections or extentlons t hat might presum ably be construed as such). C. P . CABELL Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRlBUTION: Commanding Generals, Major Alr Commands , ZI and overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelllgence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelllgence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RES TRI CT ED - 7 -
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