Unexplained
Unspecified over Washington, D.C. l operators at Washington National Airport
Investigated by a competent body and left unresolved. The rarest grade, and never awarded by us — only recorded.
The report, as filed
Washington, D.C. l operators at Washington National Airport. Radar trackings similar to those of July 26, 1952.
Held as-reported from Project Blue Book, United States Air Force. Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.