(Project Blue Book, U.S. Air Force, Washington, D.C.)
Source: NICAP.org
Project Blue Book listed the case as “UNIDENTIFIED.”
http://www.nicap.org/docs/500921provincetown_docs.pdf
Wikipedia article: “Signal Corps (United States Army)”:
https://en.wikipedia.org/wiki/Signal_Corps_(United_States_Army)
Wikipedia article: “Republic F-84 Thunderjet”:
https://en.wikipedia.org/wiki/Republic_F-84_Thunderjet
Wikipedia article: “Provincetown, Massachusetts”:
https://en.wikipedia.org/wiki/Provincetown,_Massachusetts
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(ufocasebook.com image)
P-84Bs of the 48th Fighter Squadron, 14th Fighter Group, 1948.
(Text: Wikipedia) (wikimedia.org) (Photo: wikimedia.org)
Provincetown, Massachusetts
(Photo: Google)