Unexplained
Unspecified over l0 mi
Investigated by a competent body and left unresolved. The rarest grade, and never awarded by us — only recorded.
The report, as filed
l0 mi. NW of Gulcana, Alaska. 10:13 p.m. Witnesses: crew of Northwest Air Lines flight 802. Two white flashes, followed by a dark cloud which rose and split in two.
Held as-reported from Project Blue Book, United States Air Force. Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.