As reported
Circle over Mono Lake (Area), CA
A witness account on file, unevaluated. Most of the archive rests here, and honestly so.
The report, as filed
NO KNOWN AIRCRAFT (1955 and maybe today) COULD MAKE SUCH A SPEEDY 360 DEGREE CIRCLE MANUVER, WITH NO SOUND !
Held as-reported from National UFO Reporting Center. Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.