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This US Air Force Project Blue Book case file on Kenneth Arnold's sighting of nine objects near Mount Rainier, Washington, on 24 June 1947 was released through The Black Vault. It contains the Project 10073 record card, which concludes the objects were a mirage, plus Arnold's telegram, questionnaire data and interview notes. It also includes J. Allen Hynek's analysis arguing the objects were closer and slower than Arnold estimated. Other items are David Johnson's sworn statement on a Boise sighting, a Tacoma investigation telegram and news clippings.
“The Wash”5 pages
UNCLASSIFIED # HEADQUARTERS FOURTH AIR FORCE OFFICE OF THE COMMANDING GENERAL HAMILTON FIELD. CALIFORNIA ALFDA 333.5/3 G+. 8 SEP 1947 SUBJECT: Investigation of Flying Disc. TO: Commanding General, Army Air Force, Washington, D. C. ATTENTION: AC of AS-2 1. The attached telegram was received by Lt. Col. Springer at Hamilton Field, California, 1 September 1947. 2. Reference is made to Summary of Information forwarded from this headquarters, File 4AFDA 353.5/13 (Gen) 1208-I, dated 27 August 1947. It is the opinion of this headquarters that Mr. in all sincerity, will attempt to substantiate his investigation as stated in the attached telegram. 3. Inasmuch as this headquarters has no authority to request a civilian to maintain secrecy, no request will be made to Mr. with reference to the subject matter. FOR THE CONCORDING GENERAL: Incl: Photostet, telegram dtd Aug 31. (dup) Ka'i c= , A'r . r'2 Acting Asset Adjustment General DOWNGRADED AT 12 YEAR INTERVALS; NOT AUTOMATICALLY DECLASSIFIED. DOD DIR 5200.10
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