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RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 26, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called ‘Flying Discs.” b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part Il, as may be procur- able, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelli- gence, Headquarters United States Air Foree. Cables will contain the phase, ‘‘Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIAXO-3,”’ RESTRICTED C9-4892, AF