Unexplained
Unspecified over Iwo Jima, Bonin Islands
Investigated by a competent body and left unresolved. The rarest grade, and never awarded by us — only recorded.
The report, as filed
Iwo Jima, Bonin Islands. 11:30 p.m. Witnesses: crew of USAF KB-29 aerial tanker plane. Radar tracked an unidentified target which twice approached to within .5 miles of the airplane, and once to within 6 miles, during a 2 minute observation.
Held as-reported from Project Blue Book, United States Air Force. Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.