Thompson, IowaJuly 1957

Insufficient Data

Summary

On July 23, 1957, at 12:30 p.m. in Thompson, Iowa, a student witnessed three oblong and flat silver objects moving in a straight line across the sky. The sighting lasted 13-20 seconds. The Air Force evaluated the report as "Insufficient Data for Evaluation" and marked it "Unknown." The investigating officer noted the duration conflicted with parts of the report and questioned the reliability of the information, but found the case could also be considered as possibly involving a balloon.

Reported location

Thompson, Iowa

Date of incident

July 1957

State / country

IA / US

Page count

3 scanned pages

USAF evaluation

unknown

Microfilm

T1206, Roll 28

Original case file scans

Original case file · scanned by NARAPage 1 of 3

View transcribed text

PROJECT 10073 RECORD CARD

1. DATE
23 July 1957

2. LOCATION
Thompson, Iowa

3. DATE-TIME GROUP
Local - 1230 hrs (CST)
GMT - 2430002Z

4. PHOTOS
Yes
No

5. LENGTH OF OBSERVATION
13-20 seconds

6. TYPE OF OBSERVATION
X Ground-Visual
Ground-Radar
Air-Visual
Air-Intercept Radar

7. SOURCE
Student

8. NUMBER OF OBJECTS
three

9. COURSE
returned to S

10. BRIEF SUMMARY OF SIGHTING
Three oblong and flat silver objects were seen in a straight flight (line).

11. COMMENTS
From information given, this is probably an a/c. However duration is in conflict with parts in rpt. Case also could be considered as an unreliable rpt. Final evaluation is "Insufficient Data."

12. CONCLUSIONS
[Checkboxes for:]
- Was Balloon
- Probably Balloon
- Possibly Balloon
- Was Aircraft
- Probably Aircraft
- Possibly Aircraft
- Was Astronomical
- Probably Astronomical
- Possibly Astronomical
- Other
- Insufficient Data for Evaluation [checked]
- Unknown

AFTC FORM 329 (REV 24 SEP 52)

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Source: National Archives Catalog · NAID 28970739