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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.
Read from the scan by GLM-OCR; expect the odd misread word.
1. Date 24th June 1947
2. Time 1500
3. Location Mt. Ranier, Washington
4. Name of observer
5. Occupation of observer Dealer in fire control supplies hold private
6. Address of observer Boise, Iannb
7. Place of observation Keer Mineral, Washington
8. Number of objects 9
9. Distance of object from observer 20 to 25 miles
10. Timo in sight 2-1/2 to 3 minutes
11. Altitude 9.500 ft
12. Speed XV7BI Approx 150 MPH
13. Direction of flight North to South at $ 1 7 0^{\circ} $
14. Tactics Horizontal flight
15. Sound N/S
16. Sizo Approximately that of DC-4 - 45 to 50 ft
17. Color mirror like
18. Shapo Approximately circular
19. Odor detected K/S
20. Apparent construction E/S
21. Exhaust trails I/S
22. Weather conditions CAVU
23. Effect on clouds X/S
24. Sketches or photographs Drawinga
25. Manner of disappearance N/S
26. Remarks: (over) UNCLASSIFIED Document, cited by the archive. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 62 pages are in the text index: search them above, or from the library's search.