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Archive case record

Clear Lake, South Dakota, November 1956

Date of account
1956-11
Location
Clear Lake, South Dakota
Source
uap_archive
Record updated
2026-10-10

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Record summary

Project Blue Book case file indexed from National Archives metadata; page-level review pending.

Published source text

Read the available text below. Archive transcriptions may contain OCR errors; later context is labelled separately. A recorded claim is not a finding that it happened.

Source page 1

Source text · mention only

UPUB INDEX.CAKU AISS-1EOB-477-56 12.CONCLUSIONS 2.LOCATION 口 Wos Balloon 1.DATE Clear Lake, South Dakota 口 Probably Balloon 2. 7 ~24-Nov 56 口 Possibly Balloon 4.TYPE OF OBSERVATION 口 Was Aircraft 3.DATE-TIME GROUP Ground-Radar 口 Probably Aircraft X Ground-Visual Possibly Aircroft 27/0655z Nov 56 D Air-lntercept Radar AinViswal 口 Was Astronomical 6.SOURCE 口 Probably Astronomical 口 Possibly Astronomical 5.PHOTOS OYes Civilian 口 Other. 9.COURSE 8.NUMBER OF OBJECTS 口 Insufficient Data for Evaluation 口 Unknown 7.LENGTH OF OBSERVATION Unkmowm One One and one halr hours 11.COMMENTS 10. BRIEF SUMMARY OF SIGHTING In order to obtain more information the One red to green egg-shaped object, Object concerning this eaghting, ATIc Form 16l size of a grapefruit at arm's length. was sent to the source on 29 Nov 56. was first seen at 30o elevation, 270° azinmth. Reeults ofzmalysis of returned form will be

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