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This Project Blue Book file, released through The Black Vault, covers the RB-47 encounter of 17 July 1957 over Mississippi, Louisiana, Texas and Oklahoma. It includes the record card, which lists the sighting as identified as American Airlines flight 655, and Air Defense Command correspondence that carried the sighting as unknown. There is also Major Lewis D. Chase's observer data sheet and an electronic analysis finding it difficult to conclude nothing was present. James McDonald's reconstructed account is included, along with a CAA letter about airliner incidents.
“University of Colorado”1 page
Read from the scan by GLM-OCR; expect the odd misread word.
with first, and in many cases of Andrift flights in which, no one else will have little trouble in recognizing it. It was also strange that the objects disappeared on stopped when Compton they had attracted the large asteroid ( Dallas, Ft. H. North - 0.00 In joint review of the letter from the incident, it was definitely established by the CSA that object observed in the vicinity of Dallas to work on airliner.
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. 57 pages are in the text index: search them above, or from the library's search.