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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.
ADODI-B, Hq ADC, 15 Aug 57, Subj: UFOB Sighting ADODE-B 2nd Ind 17 OCT 1957 Headquarters, Air Defense Command, Ent Air Force Base, Colorado TO: Commander, Air Technical Intelligence Center, ATTN: AFCIN 4Eh, Wright-Patterson Air Force Base, Ohio 1. The attached documents are forwarded to your center for analysis. 2. This Command is unable to offer any explanation for the sighting. Therefore, this sighting is being carried as unknown. 3. Request your center advise this Command of final analysis of this sighting. 2 Incls n/c ROBERT J HEFLING Lt Colozel. UDAT Acting Director of Intelligence WARNING AT 12:00 INTERVALS: DISCLAIMMENT ATTENTION: 12 YEARS 000 DUIS REL. 0.10 Classification Cancelled (or changed to Auth By Date 02/05/1969 AT C005-1 JUNE 1-126 ## UNCLASSIFIED This correspondence may be downgraded to UNCLASSIFIED upon removable of inels.
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.