Unexplained
Unspecified over Guatemala City, Guatemala
Investigated by a competent body and left unresolved. The rarest grade, and never awarded by us — only recorded.
The report, as filed
near Guatemala City, Guatemala. 3:55 p.m. Witness: geologist/salesman J.J. Sackett. One brilliant green-gold object, shaped like the Goodyear blimp with its length twice its height, flew 400 m.p.h. straight and level, stopped, then went straight up with one stop. Sighting lasted 22 seconds.
Held as-reported from Project Blue Book, United States Air Force. Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.