Project Blue Book Special Report (second copy)

This is Project Blue Book Special Report No. 14, "Analysis of Reports of Unidentified Aerial Objects," Project No. 10073, dated 5 May 1955. The study reduced about 4,000 sighting reports received by the U.S. Air Force between June 1947 and December 1952 to IBM punched cards and analyzed them statistically, including chi square tests comparing knowns with unknowns. It concludes that the reports very probably do not represent technological developments beyond present scientific knowledge, and it notes that no case produced physical evidence.

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98 object sightings
""^-Albuquerque
©
Unknown
2 5 . 6 %
Aircraft
20.8%
Balloon
20.0% Unknown
21.4 7. Astro
42.9%Balance of South
West Region
125 object sightings
I loon
2%/Alrcraft
16.4 7.
FIGURE 37 COMPARISON OF EVALUATION OF OBJECT SIGHTINGS IN THE STRATEGIC AREAS OF
THE SOUTH WEST REGION * ' ' s